Environmental Studies I (English Version) (1)-munotes

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CONTENTS
Unit No. Title Page No.
SEMESTER - I
1.Environment and Ecosystem 1
2.Natural Resources 29
3.Population and Emerging Issues of Development 66
4.Urbanization and Environment 86
5. Reading of Thematic Maps 101

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Unit -1
ENVIRONMENT AND ECOSYSTEM
After going through this chapter, you will be able to understand the
following features:
1.1 Objectives
1.2 Introduction
1.3 Subject discussion
1.4 Environment
a.Definition of Environment
b.Nature, Scope and Importance of Environment
c.Components of Environment
1.5 Ecosystem
d.Concept and Definition of Ecosystem
e.Functioning and Structure of Eco -System
f.Types of Ecosystem
1.6 Man-Environment Relationship
1.7 Importance and Scope of Environment al Studies
1.8 Summary
1.9 Check your Progress/Exercise
1.10 Answers to the self -learning questions
1.11 Technical words and their meaning
1.12 Task
1.13 References for further study
1.1.OBJECTIVES
By the end of this unit you will be able to –
Understand the concept, definition, nature, scope and
importance of environment and ecosystem
Understand the relationship between man and environment
Understand the importance of environmental studies
1.2.INTRODUCTION
Now a day the word Environment is often being used by
allmost all the people surrounds us, on the television and
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regularly. Everyone is speaking about the protection of the
environment. Global summits held regul arly to discuss the
environmental issues. During the last few years, the mutual
relationship among the environment, social organization and culture
has been discussed in sociology, geography and anthropology. All
shows the increasing importance of the env ironment.
Fig. 1.1
Environment is the source of life on the Earth and
determines the existence, growth and development of mankind and
all its activities. Primitive man relied heavily on the nature for their
survival. But man, among the all living being, is the most intelligent
and capable to modify his surrounding t o suit his requirements.
Therefore, continuous interactions of man and environment cause
different global, regional and local problems. With the development
of modern technology, the re is always a growing pressure on the
environment. These dynamic relation sbetween man and
environment become the primary concern for every one for the
survival of the future generation. The concern about the
environment has existed for a long time but the development in last
fifty years so have some environmental issues among the public.
The concern of environment arises from the desire to improve the
quality of life.
1.3.SUBJECT DISCUSSION
Throughout time, humans have learned to exist atmany
locations on the earth. The interaction of humans with the
environment (surroundings) in these locations has often brought
major changes in that environment. Some changes were good,
some were bad. Many times, the bad changes were caused by
humans making too much of a c hange in the environment, by using
or abusing the natural resources (anything found in nature) present.munotes.in

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Every location where people have lived contained a community of
plants, animals, insects, and other natural resources. A community
of organisms, other n atural resources, and their influence on each
other is called an ecosystem. The plants and animals existing in an
ecosystem are those most adapted to that environment.
Fig. 1.2 Different elements in the environment
Agrowing human population presents increasing
environmental challenges around the world. The study of
Environment and Ecosystem helps in understanding the dynamics
of ecology, environmental science, and cons ervation management
of natural resources, wildlife and sustainable ecosystems and
landscapes so that applicable solutions can be sought for.
1.4.ENVIRONMENT
a. Definition of Environment:
The word “ ENVIRONMENT ” originated from a French word
“Environia” , which means “ around” orto surround orto
encompass orto encircle .
Fig. 1.3 Environmentmunotes.in

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This means that environment includes things or objects or
events that surround us. It is believed that the subject has be en
introduced by the biologist Jacob Van Enkul in the early 1900s.
“The environment is the sum total of all conditions, agencies
and influences which affect the development, growth, life and
death of an organism, species or race”. (The Universal
Encyclopedia).
German scholar Fitting (1922) defined environment as “the
totality of milieu factors of an organism”.
Transley (1926) a plant ecologist described the environment as
the “sum total of those effective conditions in which organi sm
live”.
According to the American anthropologist Herskovits (1948) ,
“environment is the sum of all those external conditions and
influences, which affect the life and development of human
being”.
From the above definitions, we learn that:
Environment r efers to everything that surrounds us in which we
live.
Any external force which affects the life of an organism is a part
of environment.
Environment is a multi -directional system of interaction.
Environment is the complex of many variables.
Environment is a dynamic concept as it changes according to
time and space.
It is the sum total of conditions which affect the development
and growth of any organism.
The environment is a complex of m any variables which
surrounds man as well as all living organisms. This means
environment includes things or events surrounding us and their
interaction.
Fig. 1.4 Man -Environment Relationship
It is an i nteraction between living beings (plants/ animals)
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components like air, river, ocean or land, mountain, plateau etc. It
also includes interaction among living beings. It is thus a multi
directional system of interaction. The system is made of living and
non-living physical components of Earth.
b. Nature and Scope of Environment:
The environment is very complex in nature. It is a mixture of
living and non -living components that are interrelated to ea ch other
yet are independent. The environment is comprehensive in nature;
as it includes everything surround us. The most important property
of environment is its potential to change or dynamism . Both biotic
and abiotic components have the potential to cha nge.
Fig. 1.5 Changes in the Biotic and Abiotic factors
The other character of environment is it lies in his system.
The functioning of environment always follows a systematic order.
The h ydrological cycle is the best example of a systematic order or
sequence of the events in the environment.
Fig. 1.6 Hydrological Cycle
The scope of environment lies in the components of
environment. However, with alterations brought in the components,
the scope has widened to include their necessary protection andmunotes.in

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sense of proper utilization. It thus enables man to accept his
environmental re sponsibilities.
c. Components of Environment:
Environment is a complex phenomenon of different factors
which are the product of the forces and processes of nature. It
comprises of number of factors that interact with each other in
different ways to keep t he planet alive and support the life on the
earth. Environmental factors influence the living being in several
a) Natural Vegetation
b) Animals
c) Insects
d) Birds
e) Fish
ways. Organisms continuously take the things they need from the
environment and depend entirely on their environment for their
survival. Different living beings live in different habitats due to
differences ,in needs for survival.
Fig. 1.7 Different biotic elements and their environmentmunotes.in

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The compon ents of the natural environment can be
classified into two broad groups:
ABIOTIC or Non -living.
BIOTIC or Living.
There is also a Man-made environment .
Abiotic or Non -living Components
The abiotic or non -living components are all those physical
and chemical factors which influence the life of the living beings.
Fig. 1.8 Abiotic factors
Fig. 1.9
oLithosphere :
Lithosphere is the outer Layer of the solid earth. It consists
of minerals occurring in the earth’s crust and the soil. For example:
minerals, organic matter, air, water. The abiotic components
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Fig. 1.10 Major components of the Earth
Location : Location is the main factor as it influences the human
activities. There are two types of location viz. Absolute location
and Relative location.
Location
Absolute Relative
Absolute location is referred to the actual location on Earth’s
surface with respect to geographical coordinates (in terms of
latitudes and longitudes).
Fig. 1.11 Absolute location -Graticu lemunotes.in

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Fig. 1.12 Absolute Location of Mumbai
Relative location can be defined as the location with reference
to a reference point. The references may be natural or man -
made.
Fig. 1.13 Relative Location
Coastline : The nature of the coastline also plays an important
role as trade is dependent on waterways. The development of
ports and harbours for international trade depe nds on the nature
of coastline.
Sea
Coast
Line
Indented Coast Line
Fig. 1.14 Nature of coastlinemunotes.in

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Size and Shape of Country : The countries vary in their shape
and size. Some of the countries are large like U.S.A, Canada,
Russia and they can enjoy the large amount of resources.
Smaller count ries like Japan, Sri Lanka have limitation in
resource utilization.
Big Countries -1) Canada 2) USA 3) Russia
Small Countries -4) Japan 5) Sri Lanka
Fig. 1.15 Large & Small Countries
Shapes of the countries may be elongated, fragmented or
compact.
Fig. 1.16 Shapes of the Countriesmunotes.in

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o Hydrosphere :
The hydrosphere consists of all the water bodies on earth
surface, ocean, seas, river and lakes that consists 71% of the earth
surface. This includes water in liquid and frozen forms in
groundwater, oceans, lakes and streams. Saltwater accounts for
97% of this amount. Fresh water accounts for only about 3 %. Of
this fresh water, 2% is in the form of ice and permanent snow cover
in the Arctic, the Antarctic, and mountain glaciers. Only less than
1% of the fresh water on Earth is in easily accessible lakes,
reservoirs and river systems. It is essential for living.
Water - Salty
(Ocean &
Sea)
Fig. 1.17 Water on the Earth
o Atmosphere :
The Atmosphere is a transparent envelope of gases and
suspended particles that surround the Earth. Without atmospheric
gases, life could not exist. Even the physical processes that
operate in the atmosphere are of vital importance because they are
responsi ble for the Earth's varied climates. The atmosphere of
Earth is mostly composed of nitrogen . It also contains oxygen used
by most organisms forrespiration and carbon dioxide used by
plants forphotosynthesis . The atmosphere helps protect living
organisms from genetic damage by solar ultraviolet radiation ,solar
wind andcosmic rays .
The Atmosphere is the source of every living thing in the
world. It plays a very impor tant role in serving the world's needs.
The ozone layer in the atmosphere is a matter of tremendous
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Fig. 1.18 layers of the Atmosphere
The Atmosphere is divided into layers according to major
changes in temperature. Atmosphere consists of five main layers .
From highest to lowest, the five main layers are:
Fig. 1.19 Structure of the atmosphere
 Biotic or Living Components
Living components form the layer called Biosphere.
o Biosphere
Biosphere is defined as that part of the Earth and
atmosphere in which ecosystems exist and operate. The area of
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important for life, for it is here that the entire life is confined and the
basic processes of life like photosynthesis and respiration occur.All
the living organisms are, mostly, confined to the parts of biosphere
that receive solar radiation during the day. Different living
organisms are termed as:
I.Fauna includes all animals of lower and higher order.
Fig. 1.20 Fauna
II.Flora includes vegetation, both under water and above land.
Fig. 1.21 Flora
III.Soil can be defined as the organic and inorganic materials on
the surface of the Earth that provides the medium for plant
growth. Soil develop s slowly over time and is composed of
many different materials.
Fig. 1.22 Elements of soilmunotes.in

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There are three main components of biosphere. They are:
oProducers : The autotrophic organisms who make their own
food, mainly green plants.
oConsumers : The heterotrophic organism swho depend on
producers for their food.
oDecomposers : Bacteria and fungi belong to this category. They
breakdown the dead organic materials of producers (plants) and
consum ers (animals) for their food and re lease energy into the
environment.
Fig. 1.23 Producer, Consumer & decomposer
 Man-Made Environment
Man can modify the surroundings according to his wants.
Man has developed some environmental components using hi s
intelligence, knowledge, skill and power. These Man-made
environments are as follows:
Fig. 1.24 Transformation of Natural Environment into Cultural
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o Asocio cultural environment is a population, and it is
described with special attention paid to social andcultural factors.
It includes cultural norms, demographic information and religious
information. A set of beliefs ,customs , practices and behavior that
exists within a population are a part of it .
o The political environment is the state, government and its
institutions and legislations and the public and private stakeholders
who operate and inter act with or influence that system. The
government plays a significant role in economic development of
country. Different governmental systems are followed by the
different Countries.
o Economic Environment: different countries follows different
economic en vironment like capitalism, socialism and many others.
1.5.ECO -SYSTEM
a. Concept and Definition of Eco -system
An ecosystem includes all the living things (plants, animals and
organisms) in a given area, interacting with each other, and also
with their non -living environments (weather, earth, sun, soil,
climate,).
Fig. 1.25 Ecosystem
The term ecosystem was coined by A.G. Tansley in 1935 ,
who defined it as “the system resulting from the integration of all the
living and non -living factors of the environment”
According to R. L. Lindeman (1942), the term ecosystem
applies to “any system composed of physical -chemical -biological
processes within a space -time unit of magnitude.”
According to Monkhouse and Small , “ecosystem is an
organic community of plants and animals viewed within its physical
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From the above definitions of ecosystem, the following basic
properties emerge:
Ecosystem of any given spatial -temporal unit represents the
sum of all living organisms and physical environment.
It is a well -defined area.
It is an ope n system characterized by continuous input and
output of the energy.
It is mainly powered by solar energy.
It is a functional unit.
There is a complex interaction between the biotic and abiotic
components.
Ecosystems are natural system sandarewell organi zed.
b. Functioning and Structure of Eco -System:
Ecosystems maintain themselves by cycling energy and
nutrients obtained from external sources. There are different trophic
levels that exist in an ecosystem.
1.Primary producers (plants, algae, and some bacteria) use solar
energy to produce organic plant material through
photosynthesis.
2.Herbivores —animals that feed solely on plants —make up the
second trophic level.
Fig: 1. 26Functioning of Ecosystem
3.Predators that eat herbivores comprise the third trophic level; if
larger predators are present, they represent still higher trophic
levels.
4. Organisms that feed at several trophic levels (for example,
grizzly bears that eat berr ies and salmon) are classified at the
highest of the trophic levels at which they feed.
5. Decomposers, which include bacteria, fungi, molds, worms,
and insects, break down wastes and dead organisms and return
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Thus, the energy is obta ined from the sun and then passed
through the environment and the process is known as Energy
Flow . All the energy or nutrients flow through the ecosystem in a
cyclic order, known as nutrient cycles .
Any food chain or energy flow cycle includes three major
components viz. producers, consumers and decomposers.
o Producers
The green plants have chlorophyll with the help of which
they trap solar energy and change it into chemical energy of
carbohydrates u sing simple inorganic compounds namely water
and carbon dioxide.
Fig. 1.27 Photosynthesis
This process is known as photo synthesis. As the green
plants manufacture their own food they are known as Autotrophs
(i.e. auto = self, trophos = feeder). The chemical energy stored by
the producers is utilized partly by the producers for their own
growth and survival and the remaining is stored in the plant parts
for their future use.
o Consumers
The animals lack chlorophyll and are unable to synthesize
their own food. There fore, they depend on the producers for their
food. They are known as heterotrophs (i.e. heteros = other, trophos
= feeder ). Consumers can be classified into different orders:
Primary Consumers or First Order Consumers or
Herbivores: These are the animals which feed on plants or the
producers. They are called her bivores. Examples are rabbit,
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Secondar y Consumers or Second Order Consumers or
Primary Carnivores: The animals which feed on the herbivores
are called the pri mary carnivores. Examples are cats, foxes,
snakes etc.
Tertiary Consumers or Third Order Consumers: These are
the large carnivores which feed on the secondary consumers.
Example is Wolves.
Quaternary Consumers or Fourth Order Consumers or
Omnivores: These are the largest carnivores which feed on the
tertiary consumers and are not eaten up by any other animal.
Examples are lions and tigers.
o Decomposers or Reducers:
Bacteria and fungi belong to this category. They breakdown
the dead organic materials of producers (plants) and consumers
(animals) for their food and re lease into the environment the simple
inorganic and organic substanc es produced as by -products of their
metabolisms.The decomposers are known as Saprotrophs (i.e.,
sapros = rotten, trophos = feeder)
Fig: 1. 28Energy Flow in Ecosystem
On an average, only about 10 percent of net energy
production at one trophic level is passed on to the next level.
Processes that reduce the energy transferred between trophic
levels include respiration, growth and reproduction, defecation, and
non-predato ry death (organisms that die but are not eaten by
consumers).
Food Chainmunotes.in

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Afood chain is a linear network of links in a food web starting
from producer organisms (such as grass ortrees which use
radiation f rom the sun to make their food) and ending at apex
predator species (like grizzly bears orkiller whales ),detritivores
(like earthworms orwoodlice ), or decomposer species (such
asfungi ).A food chain also shows how the organisms are related
with each other by the food they eat. Each level of a food chain
represents a different trophic level . A food chain differs from a food
web, because the complex network of different animals and the
chain only follows a direct, linear pathway of one animal at a time .
Fig:1. 29Food Chain
Generally, we find two types of food chains:
I.Grazing food chain : It starts with green plants and goes to
grazing herbivores and on carnivores.
II.Detritus Food chain : It goes from dead organic matter into
micro -organisms and then to organisms feeding on detritus
and their predators.
Fig. 1.30 Food Chain smunotes.in

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Fig. 1.31 Food Webs
Food Web
Afood web (orfood cycle ) is the natural interconnection
offood chains . For example, in grazing food chain of a grass land,
in the absence of rabbit, grass may also have eaten by mouse. The
mouse in turn may be eaten directly by hawk or by a snake first
which is then eaten by hawk. Thus, in nature there exists an
alternative, which all together constitute an interlocking patter n
called food web.
In a food web in grass land:
I.Grass ---Grasshopper —Hawk.
II.Grass ---Grasshopper —Lizard ------- Hawk.
III.Grass ---Rabbit -----Hawk.
IV.Grass ---Mouse —Hawk.
V.Grass ---Mouse —Snake -Hawk.
Ecological Pyramid
Anecological pyramid is a graphical representation
designed to show the biomass orbioproductivity at each trophic
level in a given ecosystem .Biomass is the amount of living or
organic matter present in an organism. Biomass pyramids show
how much biomass is present in the organisms at each trophic
level, while productivity pyramids show the production or turnover in
biomass.
Energy pyramids begin with producers on the bottom (such
as plants) and proceed through the various trophic levels (such as
herbivores that eat plants, then carnivores that eat herbivores, then
carnivores that eat those carnivores, and so on). The highest level
is the topof the food chain .
Anenergy pyramid of biomass shows the relationship
between biomass and trophic level by quantifying the biomass
present at each trophic level of an energy community at a particular
time. It is a graphical repres entation of biomass (total amount of
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different tropic levels. (Typical units are grams per meter2, or
calories per meter2.)
Fig: 1. 32Energy and Ecological Pyramid
Bio-Geo-Chemical Cycle
Biogeochemical cycle is a pathway by which a chemical
substance moves through both biotic ( biosphere ) and abiotic
(lithosphere ,atmosphere , and hydrosphere ) compartments of
Earth . Water, for example, is always recycled through the water
cycle , as shown in the d iagram. The water undergoes evaporation ,
condensation , and precipitation , falling back to Earth. The other
important cycles are the carbon cycle ,nitrogen cycle ,oxygen cycle ,
phosphorus cycle ,sulfur cycle etc.
Fig. 1.33 Hydrological Cycle
c. Types of Ecosystem
There are man y types of ecosystems, but the three major
classes of ecosystems, sometimes referred to as ‘biomes’, which
are relatively contained, are the following:
 Freshwater Ecosystems
 Terrestrial Ecosystems
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o Freshwater Ecosystems
Freshwater ecosystems are found in sources of fresh water
like the following:
Pond Ecosystems –These are usually relatively small and
controlled. Most of the time they include various types of plants,
amphibians and insects and fishes.
River Ecosystems –Because rivers always link to the sea,
they are more likely to contain fish alongside the usual plants,
amphibians and insects. These sorts of ecosystems can also
include birds because birds often hunt in and around water for
small fish or insects.
Freshw ater ecosystems are the smallest of the three major
classes of ecosystems, accounting for just 1.8% of the total of the
Earth’s surface. The smallest living part of the food web of these
sorts of ecosystems is plankton, a small organism that is often
eaten by fish and other small creatures.
o Terrestrial Ecosystems
Terrestrial ecosystems are many due to natural diversity on
Earth. Some of the most common terrestrial ecosystems are as
follows:
Rainforests –Rainforests usually have extremely dense
ecosystems because there are many different types of animals
all living in a very small area.
Tundra -Tundra usually have relatively simple ecosystems
because of the limited amount of life that can be supported in
these harsh conditions.
Deserts –Desert also have harsh conditions, more animals live
in the extreme heat than live in the extreme cold of Antarctica,
for instance.
Forests –There are many different types of forests all over the
world including deciduous forests and coniferous forests. These
can support a lot of life and can have very complex ecosystems.
Grasslands –Grasslands support a wide variety of life and can
have very complex and involved ecosystems.
Wetlands -Awetland is a land area that is saturated withwater ,
either permanently or seasonally, such that it takes on the
characteristics of a distinct ecosystem . Wetlands are also
considered the most biologically diverse of all ecosystems,
serving as home to a wide range of plant and animal life.
o Marine Ecosystem
Marin e ecosystems are among the largest of
Earth's aquatic ecosystems ,salt marshes ,intertidal zones ,munotes.in

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estuaries ,lagoons ,mangroves ,coral reefs , the deep sea , and
thesea floor . They can be contrasted with freshwater ecosystems ,
which have a lower saltcontent. Marine waters cover two -thirds of
the surface of the Earth. Such places are considered ecosystems
because the plant life supports the animal life and vice versa.
1.6.MAN AND ENVIRONMENT RELATIONSHIP
Since inception, man has been dependent on the
environment for his food, clothing and shelter and other basic and
luxurious needs. His relationship with the environment has shown
dynamism. At times, he was and is friendly with nature and at times
not, but, he never destroyed the environment. Lately, with changing
nature of man’s activities and style of living, environment has
undergone certain negative changes. Thus, the relationship
between man and environment is become painful.Man started
changing the nat ural environment to suit his needs .So, he
exploited, altered and modified his natural environment .Scientific
and technological advancements enabled man to exploit his natural
environment .This resulted in destruction, degradation and damage
to the natura l environment giving rise to disaster. The results are
observed and experienced in the form of ozone depletion ,global
warming ,threats to bio -diversity ,acid rain ,desertification ,pollution ,
flooding, etc. only education, awareness and conscience can help
restore the environment and stop further loss.
1.7.IMPORTANCE AND SCOPE OF
ENVIRONMENTAL STUDIES
The scope of environmental studies is very large.
Environmental studies constitute knowledge of many disciplines of
natural sciences, social sciences and humanities, biology,
chemistry, law, sociology, anthropology and ethics and many other
disciplines. With this interdisciplinary knowledge environment
studies involve developing a sense of the spirit of the environment
or our surroundings, in a large context. Environmental studies isthe
scientific study of the environmental system and the status of its
inherent or induced changes on organisms. It includes not only the
study of physical and biological characters of the environment but
also the social and cultural factors and the impact of man on
environment.
According to UNESCO (1971), the objectives of
environmental studies are:
(a) Creating the awareness about environmental problems among
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(b)Imparting basic knowledge about the environment and its
allied problems.
(c) Developing an attitude of concern for the environment.
(d) Motivating public to participate in environment protection and
environment improvement.
(e) Acquiring skills to h elp the concerned individuals in identifying
and solving environmental problems.
(f) Striving to attain harmony with Nature.
In today’s world because of industr ialization and increasing
population, the natural resources has been rapidly utilised and our
environment is being increasingly degraded by human activities, so
we need to protect the environment. It is not only the duty of
government but also the people t o take active role for protecting the
environment, so protecting our environment is economically more
viable than cleaning it up once, it is damaged. Therefore,
environmental studies also play an important role for sustainable
development of environment.
The importance of environmental studies can be summarized
as follows:
1. To clarify modern environmental concept like how to conserve
biodiversity.
2. To know the more sustainable way of living.
3. To use natural resources more efficiently.
4. To know the behavior of organism under natural conditions.
5. To know the interrelationship between organisms in populations
and communities.
6. To aware and educate people regarding environmental issues
and problems at local, national and international levels.
1.8.SUMMA RY
Environment is the source of life on the earth and
determines the existence, growth and development of mankind and
all its activities. The interaction of humans with the environment
(surroundings) in these locations has often brought major changes
in that environment. Some changes were good, some were bad.
The environment is a complex of many variables which surrounds
man as well as all living organisms. The environment is complex,
dynamic and systematic in nature. The biotic components and
abiotic componen ts together make up the environments. There
exists man made environment that is helping man to lead a smooth
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The term ecosystem was coined by A.G. Tansley in 1935 ,
who defined it as “the system resulting from the integration of all the
living and non-living factors of the environment”. Ecosystems
maintain themselves by cycling energy and nutrients obtained from
external sources. There are different trophic levels that exist in an
ecosystem. Any food chain or energy flow cycle includes three
major c omponents viz. producers, consumers and decomposers.
Afood chain is a linear network of links in a food web starting
from producer organisms (such as grass ortrees which use
radiation from the sun to make their food) and ending at apex
predator species (like grizzly bears orkiller whales ),detritivores
(like earthworms orwoodlice ), or decomposer species (such
asfungi ). A food web (orfood cycle ) is the natural
interconnection offood chains .Anecological pyramid is a
graphical representation designed to show the biomass orbio
productivity at each trophic level in a given ecosystem .
Biogeochemical cycle is a pathway by which a chemical
substance moves through both biotic ( biosphere ) and abiotic
(lithosphere ,atmosphere , and hydrosphere ) compartments of
Earth .
The relationship between man and environment is crucial to
man’s existence and has always changed with time. This i s
resulting in disasters and loss of life, property and health. This
needs to be controlled for sustainable living.
With its interdisciplinary knowledge environment studies
involve developing a sense of the spirit of the environment or our
surroundings, in a large context.
1.9.CHECK YOUR PROGRESS/EXERCISE
1. True or False
a.The relationship between man and environment has remained
static
b.The term environment means interaction of all living and non -
living things in the surroundings
c.The term ecosystem has been coined by A.G. Tansley
d.Marine ecosystems are found in rivers and ponds
e.Environmental studies has an interdisciplinary approach
2. Fill in the Blanks
a.______________________ are among the largest of
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b.The word “ ENVIRONMENT ” originated from a French word
“Environia” , which means ________
c.The Atmosphere is divided into layers according to major
change s in _____________
d.Energy pyramids begin with ___________ onthe bottom
e.________________support a wide variety of life and can have
very complex and involved ecosystems.
3. Multiple Choice Questions
a.The topmost layer of the atmosphere at 700 to 10 ,000kms
is_________
i. Ionosphere ii. Hydrosphere iii. Exosphere iv. Mesosphere
b. ____________ helps in the decomposition of the dead matter in
a food chain
i. Herbivores ii. Detritivores iii. Autotrophs iv. Carnivores
c. The ene rgy flow from one trophic level to other trophic level is
only ________
i. 50% ii. 100% iii. 20% iv. 10%
d. ______________ order consumers are the largest carnivores
which feed on the tertiary consumers and are n ot eaten up by any
other animal
i. First order ii. Second order iii. Third Order iv. Fourth Order
e. The smallest living part of the food web of marine ecosystems is
_____________, a small organism that is often eaten by fish and
other small c reatures.
i. Small fishes ii. Plankton iii. Worms iv. Weeds
1.10.ANSWERS TO THE SELF -LEARNING
QUESTIONS
1. True or False
1.a. False
1.b. True
1.c. True
1.d. False
1.e. True
2. Fill in the Blanks
2.a. Marine ecosystems
2.b. Around
2.c. Temperature
2.d.Producers
2.e. Grasslands
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3.a. Exosphere
3.b. Detritivores
3.c. 10%
3.d. Fourth order
3.e. Plankton
1.11.TECHNICAL WORDS AND THEIR MEANINGS
Environment: The environment is the sum total of all
conditions, agencies and influences which affect the
development, growth, life and death of an organism, species or
race
Ecosystem: Ecosystem is an organic community o f plants and
animals viewed within its physical environment or habitat
Food chain: Afood chain is a linear network of links in a food
web starting from producer organisms and ending at apex
predator species detritivores ordecomposer species
Food web: Afood web (orfood cycle ) is the natural
interconnection of food chains
Ecological pyramid: Anecological pyramidis a graphical
representation designed to show the biomass orbio
productivity at each trophic level in a given ecosystem
Biogeochemical cycles: Biogeochemical cycle is a pathway by
which a chemical substance moves through both biotic and
abiotic compart ments of Earth .
1.12.TASK
Collect examples of food chains from all types of
ecosystems and represent them using pictures. Put some useful
information and support your chart with a map of the location of the
ecosystem.
1.13.REFERENCES FOR FURTHER STUDY
Environmental Studies, Bagad Anjali
Sustainable Urban Environments: An Ecosystem Approach,
Beuren, Allan et. Al.
The Sage Handbook of Environment and Society, Ward,
Hugh eds.
Environment and Sustainable Development, Sundar, I.
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Unit -2
NATURAL RESOURCES
After going through this chapter, you will be able to understand the
following features:
2.1 Objectives
2.2 Introduction
2.3 Subject discussion
2.4 Definition
2.5 Characteristics of Resources
2.6 Classification and types of Resource
2.7 Factors Influencing Resource Utilization
2.8 Conservation Methods of Natural Resource
2.9 Non-Conventional Resources
2.10 Problems Associated with and Management of water, forest
and energy resource
2.11 Resource Ut ilization and Sustainable Development
2.12 Summary
2.13 Check your Progress/Exercise
2.14 Answers to the self -learning questions
2.15 Technical words and their meaning
2.16 Task
2.17 References for further study
2.1OBJECTIVES:
 To learn different types of resources
 To understand the resource utilization pattern
 To understand threats and solutions towards resource use
2.2INTRODUCTION:
The modern economy is a resource -based economy and the
development of a country or a region is based on its resources,
specially the natural resource. We use a variety of materials
derived from the environment. Nature has given us abundant
resources in theform of water, air, soil, wild animals, metals,
fossils, fuels etc. and man by his technical skill and knowledge
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Fig. 2.1 Selected Natural Resources
Aresource is anything that is used to satisfy human needs.
Typically, resources are materials, energy, services, staff,
knowledge, or other assets that are transformed to produce benefit
and in the process, may be consumed or made unavailable. Proper
utilization of natural resource may use to increased wealth, meeting
needs or wants, proper functioning of a system, or enhanced well -
being.
Fig. 2.2 What is a Resource
From a human perspective a natural resource is anything
obtained from the environment tosatisfy human needs and
wants. From a broader biological or ecological perspective, a
resource satisfies the needs of a living organism.
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Fig. 2.3 Resource
2.3SUBJECT DISCUSSION:
Typically, resources are materials, energy, services, staff,
knowledge, or other assets that are transformed to produce benefit
or satisfaction of the human being. Resource comes from an old
French word meaning "relief" or "recovery," which certainly ties in
with the idea of a resource being something that offers necessary
aid.The exploitation of nature and natural resources can be dated
back to the advent of humankind and the very start of civilization.
Some materials are existing in the environment, the use of
which is not known to a man at present. This natural stuff is known
asendowment.
Fig. 2.4 Transformation : From Endowment to Resource
The potential resources are the natural materials that exist in
the environment, whose use is known to man but n ot using the
material to satisfy the human needs/wants . There are differences in
the level of resource utilization in developed, underdeveloped and
developing countries. As with the help of capital, knowledge and
technology ,developed countries are rich using the resources,
backward countries in endowments and developing countries in
potentials. Therefore, knowledge, capital and technology are
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Water
Fall
Undeveloped Developing Developed
Fig. 2.5 Endowment same -Resources different
2.4DEFINITION:
According to Enrich W. Zimmerman,
“A man -less universe is void of resources; for resources are
inseparable from man and his wants. They are the environment
in service of man.”
“Resources does not refer to a thing or a substance but to a
function which a thing or a substance may perform or to an
operation in which it may take part , namely the function or
operation of attaining a given end such as satisfying wants.”
Resource is the ability to perform the work of satisfying the
needs or wants of human being.
2.5CHARACTERISTICS OF RESOURCES
Resources, natural as well as human, possess certain
characteristics which are as follows.
Usefulness :-Usefulness is one of the most important
characteristics of all the resources. All resources are useful.

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Limitedness :-Resources are limited. Time has the unique
characteristic of being the one resource constant in amount for all.
Limitedness of resource is of two types namely Qualitative and
Quantitative. Human Resources are Qualitatively limited where as
Non-human resources are Quantitatively limited.
Fig. 2.7 Human Resources : Qualitatively Limited
Fig. 2.8
Dynamic nature of resources : the resource is not a static but
dynamic concept. The types and quality of resources that the man
has been using has changed considerably over time.
All resources are inter -related: Inter-related ness of resources
is one of the important characteristics of resources.
Quality of life is determined by the use of resources : As the
man is knowledgeable and technologically sound can use more
resources. Quality of life can be enhanced by using more amou nts
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Fig. 2.9 Conversion of Endowment into Resources
2.6CLASSIFICATION AND TYPES OF RESOURCE:
Resource can be classified on the basis of their nature,
durability, ownershi p and distribution pattern. All the resources are
derived from the environment . Many natural resources are essential
for human survival, while others are used for sati sfying human
desire.
 Natural Resources:
Anatural resource is anything that people can use which
comes from nature . People do not make natural resources, but
gather them from the earth.Resources can be categorized on the
basis of origin:
A. On the basis of Origin of Resource :
 Abiotic resources comprise non -living things (e.g., land,
water ,airandminerals such as gold, iron, copper, silver).
Fig. 2.10 Abiotic Resources
 Biotic resources are obtained from the biosphere . Forests
and their products, animals, birds and their products, fishand other
marine organisms are important examples. Minerals such as coal
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they were formed from fossilized organic matter, though over long
periods of time.
Fig. 2.11 Biotic Resources
B. On the basis of Stage of Development :
 Potential resources are known to exist and may be used in
the future. For example, petroleum may exist in many parts of India
and Kuwait that have sedimentary rocks, but until the time it is
actually drilled out and put into use, it remains a potential resource.
Fig. 2.12 Potential Resources & Actual Resource
 Actual resources are those that have been surveyed, their
quantity and quality determined, and are being used in present
times. For example, petroleum and natural gas is actively being
obtained from the Mumbai High Fields. The development of an
actual reso urce, such as wood processing depends upon the
technology available and the cost involved. That part of the actual
resource that can be developed profitably with available technology
is called a reserve resource, while that part that cannot be
developed profitably because of lack of technology is called a stock
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 Stock resources are those that have been surveyed but
cannot be used due to lack of technology available for the proper
useof resource. Example: Hydrogen.
C. On the Basis of Renewability :
 Non-renewable resources are formed over very long
geological periods . Minerals and fossils are included in this
category. Since their rate of formation is extremely slow, they
cannot be replenished, once they are depleted . They are limited
resource and once they are used reproduction is not possible. As
these resources ar e known as Exhaustible or Fund resource s.
The exhaustible resources are recyclable and non -recyclable. The
recyclable resources are those who’s reproduction is not possible
but the product can be recycled again and again. Some examples
of recyclable resour ces are newspapers, cardboard, office paper ,
iron, steel, metal products and glass .
Some of the exhaustible resources are non-recyclable .
They are of single use. Once they are used cannot be used again
and again. The examples of non -recyclable resources are coal,
natural oil, natural gas etc. All the fossil and fuel are the examples
of non -recyclable resources. They are creating problems f or the
economic development of a ny nation as the growing
industrialization and urbanization depends on the use of fossil fuel s.
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 Renewable resources ,such as forests and fisheries, can
be replenished or reproduced relatively quickly. The highest rate at
which a resource can be used sustainably is the sustainable yield .
Some resources, like sunlight, air, and wind, are called perpetual
resources because they are available conti nuously, though at a
limited rate.
Fig. 2.14 Renewable Resources (Flow Resources)
 These types of resources are also known as inexhaustible
or flow resource . Their quantity is not affected by human
consumption. Many renew able resources can be depleted by
human use, but may also be replenished, thus maintaining a flow.
Some of these, like agricultural crops, take a short time for renewal;
others, like water, take a comparatively longer time, while still
others, like forests , take even longer. But at present we are facing
the problems related to the quality of renewable resources like air,
water. As air and water pollution is increasing every day, many
countries facing a big problem to solve the problems. Dependent
upon the s peed and quantity of consumption, over consumption
can lead to depletion or total and everlasting destruction of a
renewable resource s. Important examples are agricultural areas,
fish and other animals, forests, healthy water and soil, cultivated
and natur al landscapes. Such conditionally renewable resources
are sometimes classified as a third kind of resource, or as a
subtype of renewable resources. Conditionally renewable
resources are presently subject to excess human consumption and
the only sustainable long-term use of such resources is within the
so-called zero ecological footprint , wherein human use less than
the Earth's ecological capacity to regenerate.
D. Onthe Basis of Distribution Pattern:
 Ubiquitous resources are found everywhere (e.g., air, light
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Fig. 2.15 Ubiquitous Resources
 Localized resources are found only in certain parts of the
world (e.g., copper and iron ore, geothermal power).These
resources are found in some specific places on earth and much
valuable and also help in the economic development of any
country.
Fig. 2.16 Localized Resources
E. On the Basis of Ownership Pattern:
 Individual resources are also known as personal
resource s. As this type of resource sare completely utilize or
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Fig. 2.17 Individual and Natural Resources
 National resources are the resources which can be
collectively used by the people of any nation or country. They are
used for the benefit of all the nation. e.g. river, forest etc.
 International resources are all the natural resources in the
world which are common resource sfor every living being. e.g.
atmosphere, hydrosphere and lithosphere.
Fig. 2.18 International Resources
F. On the Basis of Physical Existence:
 Tangible resources such as equipment s which have actual
physical existence
 Intangible resources such as corporate images, brands
and patents, and other intellectual property exist in abstraction.
 Human or Cultural Res ources:
Human Resources refer to the individuals or personnel or
workforce within an organization responsible for performing the
tasks given to them for the purpose of achievement of goals and
objectives of the organizat ion which is possible only through proper
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(performance appraisal), providing appropriate compensation and
benefits, maintaini ng proper labor relations and ultimately
maintaining safety, welfare and health concern of employees, which
isprocess of the human resource management. Human resources
like skill, knowledge etc. are very important. Many times, we are not
aware of these resources. This group of resources are very
important to the family, for not only are they the means of
accomplishing desired ends, but in using them well the group acts
together in such a way that common goals seem more re al and
attainable and the quality of interpersonal relations can be lifted.
2.7FACTORS INFLUENCING RESOURCE
UTILIZATION:
The amounts of resources utilized vary from one region to
other. Many factors play important role in the process of resource
utilization . Many problems have been experienced by developed
and developing countries in the development and use of natural
resources. Some of the important factors are:
Fig. 2.19 Factors influencing resource utilization
 Technologi cal skill : One limitation to maximize resources is
technology. Many countries still lack the technology to tap new
resources. Our country is blessed with natural resources. However,
not all of them are being harnessed because some remain
undiscovered, whil e others such as mineral resources are difficult
to tap.
 Financial Limitations : This problem is also brought about
by the lack of funds to support projects for discovering new
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availability of capital. Most of the time developing countries not able
to explore the new resources due to low amount of financial
support.
 Cost Benefit Ratio : Production cost of the resource is an
important factor in utilization process. In the area s where
production cost is high resources are not exploited. Generally, the
snow capped mountains and forest areas are not exploited up to
optimum level due to high cost ratio.
 Availability of Substitutes : Availability of the substitute
products is a facto r for less utilization of resources. Sometimes
cheap substitutes are available in market. For example, natural
rubber is not use much as synthetic rubber which is cheap.
 Availability of Skilled Labo urs: Proper resource
exploitation depends on the availabi lity of skilled and unskilled
labours. In underdeveloped and developing countries many
potential and endowment resources are available but due to not
availability of skilled manpower, they are not converted into
resource.
 Level of Demand :Economic develo pment and our
expanding needs and wants result in an increase in the use of
resources to produce goods and services. One example is the
increased consumption of coal and oil brought about by the rise of
electrical energy consumption (which is used to run a ppliances like
television sets, and refrigerators).
 Level of pollution : Pollution can limit the potential of
resources. Because of pollution natural resources are being
degraded, making it difficult to harness them to their fullest
potential. For instance , when bodies of water are polluted, the
organisms living in it are affected. Air pollution, on the other hand,
degrades air quality and may cause illnesses to human beings and
animals and damage the environment.
 Government Policy : Governmental policies p lay an
important role in resource development. Different countries follow
different resource exploitation policies.
2.8CONSERVATION METHODS OF NATURAL
RESOURCE S:
Conservation is the protection, improvement, and wise
use of natural resource sto provide the greatest social and
economic value for the present and the future. Conservation is the
management of natural resources with the goal of sustainability .
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value of to human in one form or the other. However, the
advancement of modern civilization has had a great impact on o ur
planet's natural resources. So, conserving natural resources is very
essential today. There are many ways that one can conserve
natural resources. All you need to do is to look around and see
what natural resources you are using and find out ways to lim it your
usage.
 Recycling : Many products such as paper, cardboards, and
cups come from trees. In fact, trees are our natural assets, you can
converse trees by recycling the paper products we can minimize
the number of trees cut down a year. This is one for m of waste
recycling. One should understand and know the importance of
recycling waste materials. One simple benefit of recycling is it
saves our resources. It will be wise to reuse metal item as metal
reserves may be depleting. You can sell old metal item s for
recycling. As mentioned earlier, recycling of waste papers can save
our forests. Recycling waste not only save our natural resources
but also help tosave energy.
Fig. 2.20 Recycling of paper products
 By simply recycling an item or making a basic fix to it, we
can save all the energy that would have been consumed in the
process of making it. The same example can be taken with plastic
items. A large amount of energy can be saved by simply reusing
the pla stic items. To recycle waste is to simply reduce pollution. By
recycling plastic material, we can reduce air pollution as well as
water pollution. Plastic factories produced large amount of smoke
when producing plastic material at the same time if we don’t have
proper waste disposal system those waste emissions will cause
water pollution. Recycling waste in a way helps toreduce
pollution.In simple words, recycling or recycling waste is essential
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2.9NON -CONVENTIONAL RESOURCES:
Energy generated by using wind, tides, solar, geothermal heat, and
biomass including farm and animal waste as we ll as human excreta
is known as non -conventional energy. All these sources are
renewable or inexhaustible and do not cause environmental
pollution. Moreover, they do not require heavy expenditure.
1.Wind Energy:
Wind power is harnessed by setting up a wi ndmill which is
used for pumping water, grinding grain and generating electricity.
Wind power is the use of air flow through wind turbines
tomechanically power generators for electricity . The India has been
rated as one of the most promising countries for wind power
development. The gross wind power potential of India is estimated
to be about 20,000 MW, wind power projects of 970 MW capacities
were installed till March. 1998. India ranks fifth in the world in wi nd
power generation. Areas with constantly high speed preferably
above 20 km per hour are well -suited for harnessing wind energy.
Fig. 2.21 Wind Energy
2.Tidal andWave Energy:
Sea water keeps on rising and falling alternatively twice a
day under the influence of gravitational pull of moon and sun. This
phenomenon is known as tides. A difference or height of high and
low tide water level spin the turbines. The tidal energy can be
harnessed by constructing a tidal barrage. At the time of high tide,
the sea water flows into the reservoir of the barrage and turn the
turbine, which generates electricity. It is estimated that India
possesses 8000 -9000 MW of tidal energy potential. The Gulf of
Kuchchh is best suited for tidal energy.
3.Solar Energy:
Sun is the source of all energy on the earth. It is most
abundant, inexhaustible and universal source of energy. All the
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blessed with plenty of solar energy because most parts of the
country receive bright sunshine throughout the year except a brief
monsoon period. India has developed technology to use solar
energy for cooking, water heating, water dissimilation, space
heating, crop drying etc.
Fig. 2.22 Solar Energy
The technologies used in the solar energy are broadly
classified as either passive solar or active solar depending on the
way of capture, convert and distribute. Active solar techniques
include the use of photovoltaic panels and solar thermal collectors
toharness the energy. Passive solar techniques include the
orienting a building to the sun, selecting materials with favorable
thermal mass or light dispersing properties, and designed the
spaces that naturally circulate air.
4.Geo-Thermal Energy:
Geo-thermal energy is the heat of the earth's interior. This
energy is manifested in the hot springs. India is not very rich in this
source,
5.Energy from Biomass:
Biomass refers to all plant material and animal excreta when
considered as an energy source. Some important kinds of biomass
are inferior wood, urban waste, bagasse, farm animal and human
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Fig. 2.23 Biogas Plant
Importance ofnon-conventional sources ofenergy:
1. The non -conventional sources of energy are abundant in nature.
According to energy experts the non -conventional energy
potential of India is estimated at about 95,000 MW.
2. These are renewable resources. The non -conventional sources
of energy can be re newed with minimum effort and money.
3. Non -conventional sources of energy are pollution -free and eco -
friendly
2.10. PROBLEMS ASSOCIATED WITH MANAGEMENT
OF WATER, FOREST AND ENERGY RESOURCE S:
 Water Resource s:
One of the basic requirement of the living being is availability
of water. Adequate supply of fresh water is important for
maintaining the life on the Earth. Water is a natural resource has
influence on almost every aspect of development. Agriculture,
industries and households, all s ector needs adequate supply of
fresh water. Water resources are sources of water that are useful or
potentially useful to humans. Water is indispensable natural
resource that human terms water as a LIFE. The whole earth looks
blue from the space and descri be as the blue planet. This is
because Earth is rich in water. The hydrosphere forms 71% of the
earth surface. But 97% of this water is a salt water and sodium
chloride is the most abundant dissolved substances. Magnesium,
calcium and other elements in the rest of the salts have very less
proportion. This salt water is not useful for drinking, agriculture and
industrial purposes. 97 % of the water on the Earth is salt water and
only three percent is fresh water ; slightly over two thirds of this is
frozen in glaciers and polar ice caps . The remaining unfrozen
freshwater is found mainly as groundwater, with only a small
fraction present above ground or in the air.
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renewable resource . Water is used in different sectors such as
agriculture, industry and domestic use. It is estimated that 70% of
worldwide water is used for irrigation, with 15 -35% of irrigation
withdrawals being unsustainable. It takes around 2,000 -3,000
litres of wate r to produce enough food to satisfy one person's daily
dietary need s. This is a considerable amount, when compared to
that required for drinking, which is between two and five litres. It is
estimated that 22% of worldwide water is used in industry. It is
estimated that 8% of worldwide water use is for domestic purposes.
These include drinking water ,bathing ,cooking ,toilet flushing ,
cleaning, laundry and gardening .
 Degradation of water resources:
 Pollution: Water pollution is a major global problem which
requires ongoing evaluation and revision of water resource policy at
all levels (international down to individual aquifers and wells). It has
been suggested that water pollution is the leading worldwide cause
of deaths and diseases, and that it accounts for the deaths of more
than 14,000 people daily. An estimated that a bout 580 people in
India die of water pollution related illness every day. About 90
percent of the water in the cities of China is polluted.
 Sources of Water Pollution and Effect of Water
Pollutants:
 Domestic Wastes and Sewage: Domestic waste is one of
the main source of water pollution. Organic waste gives rise to
scum and sludge that makes the water unfit for recreational and
industrial use. Modern day detergents degrade very slowly. They,
therefore, accumulate and render the water unfit for human and
animal use. The phosphates present in detergents further stimulate
algal growth that add to the organic loading of water.
 Surface Run -Off: The pollutants present on the surface of
land and fertilizers added to the soils are washed down into water
reservoirs and water courses during rains. This flow of fertilizer rich
water into streams and lakes gives rise to eutrophication.
 Thermal pollution: Thermal pollution is the degradation
ofwater quality by any process that changes ambient
water temperature . A common cause of thermal pollution is the use
of water as a coolant bypower plants and industrial manufacturers.
When water used as a coolant is returned to the natural
environment at a higher temperature, the change in temperature
decreases oxygen supply and affects ecosystem composition. Fish
and other organisms adapted to particular temperature range can
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 Industrial Effluents: The industrial wastes are allowed to
pass into water bodie s. The important toxic chemicals presents in
them create pollution. Mercury is released during combustion of
coal, smelting of metallic ores, paper and paint industries. Mercury
is persistent. In water it gets changed into water soluble
compounds and enters the food chain accompanied by biological or
ecological amplification. Human beings feeding on poisoned
animals and fishes develop a crippling deformity called minamata
disease. The sources of lead pollution are smelters, battery,
industry, pain t, chemical and pesticide industries, automobiles’
exhausts, etc. It causes anaemia, headache, and bluish lines round
the gums. Copper, zinc, nickel, titanium, etc. cause toxaemia and
change in enzyme functioning. Several types of liquid effluents
containi ng toxic chemicals, acids and bases, are added to the rivers
and other water bodies. They kill fish and other aquatic life besides
being toxic to human being.
 Overuse and Misuse of Water :
The biggest misuse of water is the excessive pumping of
groundwater . It is most scary in India and China, which rely on
large -scale, industrialized agriculture to feed their huge populations.
They withdraw more groundwater than Mother Nature provides
reliably each year. The aquifers in both China and India, as well as
inthe United States, are declining. The world is pumping more
water from the ground than is sustainable ; more than is be ing
refilled by nature. Eventually, if things do not change, these
groundwater sources will be pumped dry.We need to change the
way we are using water and the amount of water we are pulling
from the ground, in addition to addressing larger ecological and
climate issues that have an impact on our water supply as well, if
our future generations are going to have the water they need for life
itself.
 Conservation of Water Resource:
Water is essential for life on our planet. It is required for
many things including growth of food, maintaining ourselves clean,
power generation, in cases to control fire and most importantly to
stay alive. Water is a part of our daily life and we are hea vily
dependent on it. The average family of four uses 450 liters (120
gallons) of water a day, which is 164,000 liters (44,000 gallons) a
year. The conservation of water is very important and necessary to
have a healthy and long -lasting life. Conserving th e water is not
difficult, it saves money, and it is beneficial to our future. We do not
know if there will be enough water for a more crowded world in the
future. We must learn about the importance of water, and conserve
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Fig. 2.25
Water conservation refers to the reduction in usage of water.
It can also include the recycling of water for purposes like irrigation,
cleaning, and even treatment for later use. That is the reason why
we need to conserve our water we need to take action n ow,
because it may be too late. Now a days we use much more water
than we ever did. Every human being uses hundreds of gallons of
water per day. This makes a state’s population use millions of
gallons of water a day. All this consumption of water comes to a
high cost, sometimes paying hundreds of dollars per month.
Reducing the water you use will save you money. Even though,
water makes up about seventy percent of the earth’s surface, only
a small percentage of that water is attainable for usage. Reducing
the amount of water used will help you economically as well as
benefiting you and your family in the future.
 Some steps to conserve water resources:
Rainwater harvesting is the accumulation and deposition of
rainwater for reuse on -site, rather than allowi ng it to run off.
Rainwater can be collected from rivers orroofs , and in many
places the water collected is r edirected to a deep pit ( well,
shaft, or borehole ), a reservo ir with percolation, or collected
from dew or fog with nets or other tools. Its uses include
water for gardens, livestock ,irrigation , domestic use with
proper treatment, and indoor heating for houses etc. The
harvested water can a lso be used as drinking water , longer -
term storage and for other purposes such as groundw ater
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Fig. 2.26 Rainwater Harvesting
Watershed management is the study of the relevant
characteristics of a watershed aimed at the sustainable
distribution of its resources and the process of creating and
implementing plans, programs, and projects to sustain and
enhance watershed functions that affect the plant ,animal ,
andhuman communities within a watershed boundary.
Features of a watershed that agencies seek to manage
include water supply ,water quality ,drainage ,storm
water runoff, water rights , and the overall planning and
utilization of watersheds. Landowners ,land use agencies,
storm water management exper ts, environmental specialists,
water use surveyors and communities all play an integral
part in watershed management.
Control pollution: Fresh water is a limited resource. Some
steps should be taken to control the water pollution. In
agricultural sectors sediment (loose soil) washed off fields is
the largest source of agricultural pollution. Farmers may
utilize erosion controls to reduce runoff flows and retain soil
on their fields. Common techniques include contour plowing .
Some industrial facilities generate ordinary domestic sewage
that can be treated by municipal facilities. Industries that
generate wastewater with high concentrations of
conventional pollutants (e.g. oil and grease), toxic pollutants
(e.g. heavy metals, volatile organic compounds) or other
non-conventional pollutants such as ammonia, need
specialized treatment systems. Some of these facilities can
install a pre -treatment system to rem ove the toxic
components, and then send the partially
treated wastewater to the municipal system. In urban areas
of developed countries, domestic sewage is typically treated
by centrali zed sewage treatment plants. Well -designed and
operated systems can remove 90 percent or more of the
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Water efficiency: Water efficiency means thinking about th e
way you use water, in other words, your water management.
The key is to try to reduce your water use ifpossible and not
towaste water .Water efficiency is reducing water wastage
by measuring the amount of water required for a particular
purpose and the amount of water used or delivered. Water
efficiency differs from water conservation. In that it focuses
on reducing waste, not restricting use. Solutions f or water
efficiency focus not only on reducing the amount of potable
water used, but also on reducing the use of non -potable
water where appropriate (i.e. flushing toilet, waterin g
landscape, etc.). It also emphasizes the influence
consumers can have in water efficiency by making small
behavioral changes to reduce water wastage and by
choosing more water efficient products.Examples of water
efficient steps includes fixing leaking t aps, taking showers
rather than baths, installing displacements devices inside
toilet cisterns, and using dishwashers and washing
machines with full loads. These are things that fall under the
definition of water efficiency, as their purpose is to obtain t he
desired result or level of service with the least necessary
water.
 Forest Resource:
Aforest is a large area of land covered with trees or
other woody vegetation . United Nations Food and Agriculture
Organization definition .Forests covered four billion hectares (15
million square miles) or approximately 30 percent of the world's
land area in 2006.Forests are the dominant terrestrial ecosystem of
Earth, and are distributed across the globe. Forests account for
75% of the gross primary productivity of the Earth's biosphere , and
contain 80% of the Earth's plant biomass. The amount of
precipitation and the elevation of the forest also affect forest
composition. Human society and forests influence each other in
both positive and negative ways. Forests provide ecosystem
services to humans and serve as tourist attractions. Forests can
also impose costs, affect people's health, and interfere with tourist
enjoyment. Human activities, including harvesting forest resources,
can negatively affect forest ecosyst ems. Many forests have a
deeper spiritual importance for those who live there and for those
who never visit forest but always cherish the thought of their
existence.
 Importance of Forest as a Resource:
 Economic Importance : Forest is the main source of food
for the primitive societies. Forest is the main source of fuel for
domestic use in many underdeveloped and developing countries. It
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etc.It is the sourc e of different types of medicines like ayurvedic,
unani medicines etc. It supplies raw materials to many industries
like paper, building materials, furniture and other industries.
 Environmental Importance: They play an important role in
maintaining the quality of the environment. Forest also controls
flood by reducing the siltation. It prevents the soil erosion and help
in the process of soil conservation by holding the soil particles
firmly. It helps in con serving water and regulating the water cycle. It
is the habitat for many wild animals. They play a vital role in
maintaining ecological balance.
 Distribution of Forest:
The world's forests cover some 3, 400 million hectares -an
area the size of North and South America combined. During the
1980s more than 15 million hectares of tropical forests were lost
each year: the overwhelming majority of the deforestation was
intended to provide land for agriculture. The largest losses occurred
in tropical moist deci duous forests, the areas best suited for
settlement and farming. The extent of these forests declined by 61
million hectares -more than 10 percent of their area -while 46
million hectares, or 60 percent, of tropical rainforests were lost. Few
of these are as have been replanted.
The forest is not evenly distributed in the world. Forest
distribution and types are greatly influenced by different climatic
factors likerainfall and temperature. The other factors like soil,
slope, altitude etc. are also important.
Tree cover is increasing in many temperate regions, mainly
due to the establishment of forest plantations. Europe increased its
forest and wooded land by 2 percent over the 1980s and there
were small increases in New Zealand and Aus tralia. In the same
decade, however, a drop of some 3.5 million hectares occurred in
the United States. The area of the former USSR reported an
increase between 1978 and 1988. However, there is an urgent
need to bring many of the Siberian forests under sus tainable
management to avoid their degradation. As well as managing some
forests for production, diversity should be preserved in others by
designating protected areas.
 Types of Forest:
1. Tropical Forest
a. Tropical Rain Forest
The tropical rainforests contain the greatest diversity of species
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between the Tropic of cancer (23½0N.) & the Tropic of
Capricorn (23½0S.)
The evergreen forest sare usually found in areas rece iving
rainfall more than 200cm and having more temperature .
They occupy 7% of the earth surface.
The wood is very hard and difficult to cut.
It is found in central America, the Amazon basin, the Congo
basin, S.E. Asia and northern margin of Australia.
Thes e forest are dense and have broad leaves that release
excess water trough transpiration.
Important species are teak, ebony, rosewood, ironwood,
mahagony etc.
b.Tropical Seasonal Forest
This forest is found in region of monsoon rain, mainly in India
and part of SE Asia.
They occupy 9% of the earth ’ssurface area.
These forests are more open and allow a denser undergrowth of
bamboo, shrubs and grasses.
These forests are broad -leafsand shed leaves during dry
season.
Important species are teak, sal, sandalwood, neem etc.
2.Temperate Forest
They aremainly found in Eastern United States and Canada,
Western Europe and parts of Russia, China and Japan.
There are four distinct seasons in temperate deciduous forests
and prec ipitation falls throughout the year. Temperate
deciduous forests receive 30 -60 inches of rain per year.
Maple, oak and birch trees are some examples of the deciduous
trees that dominate these forests.
Trees provide hard wood and are decidu ous.
3.Coniferous Forest
Coniferous forests are made up mainly of cone -bearing or
coniferous trees, such as spruce, hemlock, pine and fir.
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Coniferous trees thrive where summers are short and cool and
winters long and harsh, with heavy snowfall that can last as long
as 6 months.
4.Taiga or Boreal Forest
Taiga also known as boreal forest orsnow forest, is
characterized by coniferous consisting mostly of pines, spruce
and larches.
InNorth America it covers most of inland Canada andAlaska as
well as parts of the extreme northern continental United States.
Taiga is the world's largest land biome, and makes up 29% of
the world's forest cover, the largest areas are located in Russia
and Canada.
Thetaiga experiences relatively low precipitation throughout the
year (generally 200 –750mm annually, 1,000 mm in some
areas), primarily as rainduring the summer months, but also
asfogandsnow .
Problems associated with forest
 Deforestation
Humans have generally decreased the amount of forest
worldwide. Anthropogenic factors that can affect forests include
logging, urban sprawl , human -caused forest fires ,acid
rain,invasive species , and the slash and burn practices or shifting
cultivation . The loss and re -growth of forest leads to a distinction
between two broad types of forest, primary or old-growth
forest andsecondary forest . There are also many natural factors
that can cause changes in forests over time including forest
fires,insects ,diseases , weather, competition between species, etc.
In 1997, the World Resources Institute recorded that o nly 20% of
the world's original forests remained in large intact tracts of
undisturbed forest. More than 75% of these intact forests lie in
three countries —theboreal forests of Russia and Canada and the
rainforest of Brazil.
 Main Causes of Deforestation :
For the most part, human activity is to blame for
deforestation, though natural disasters do play a role. So let's take
a look at how and why humans deforest areas.
1. Logging , or cutting down trees in a forest to harvest timber
for wood, products or fuel, is a primary driver of deforestation.
Logging affects the environment in several ways. Since trucks and
large equipment need to get into the forest in order to access trees
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roadways. Selective logging --where only the most valuable trees
are felled --doesn't help matters, as one falling tree can bring down
dozens of surrounding trees and thin the forest's protective ca nopy.
Theforest canopy is important to the forest's ecosystem because
it houses and protects plant, animal and insect populations. It also
protects the forest floor, which slows down soil erosion.
2. Agriculture also drives deforestation. Farmers clear the
land for crops or for cattle and often will clear acres of land using
slash and burn techniques --cutting down trees and then burning
them. Migratory farmers clear a forest area and use it until the soil
becomes too degraded for crops. Then they move on a nd clear a
new patch of forest. The abandoned land, if left untouched, will
eventually reforest, but it will take many, many years to return to its
original state.
3. Mining also results in deforestation. Digging a coal, diamond
or gold mine requires the rem oval of all forest cover, not just for the
mines but also for trucks and equipment.
4. Fires both natural or man -made, destroy acres of forest very
quickly. Areas affected by logging are more susceptible to fires due
to the number of dried, dead trees. Milder winters and extended
warm seasons due to global warming also fuel fires. In the United
States, there are typically between 60,000 and 80,000 forest fires
that occur each year, burning 3 million to 10 million acres (12,000
to 40,000 square kilometers) of land depending on the year.
5. Agriculture and Grazing: Deforestation occurs mainly due to
the conversation of land for agriculture and grazing purpose.
6. Hydroelectric dams are quite controversial because while
they help to power communities, they also contribute to
deforestation.
7. Urbanization: Further on order to gain access to these
forests, the construction of roads is undertaken; here again trees
are chopped to create roads. Overpopulation too directly affects
forest covers, as with the expansion of cities more land is needed
toestablish housing and settlements. Therefore, forest land is
reclaimed.
8. Desertification ofland: Some of the other factors that lead
to deforestation are also part natural and part anthropogenic like
Desertification of land. It occurs due to land abuse m aking it unfit
for growth of trees. Many industries in petrochemicals release their
waste into rivers which results insoilerosion and make it unfit to
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 Effects of Deforestation
1.Climate Imbalance: Deforestation affects theclimate in more
than one ways. Trees release water vapor in the air, which is
compromised on with the lack of trees. Trees also provide the
required shade that keeps the soil moist. This leads to the
imbalance in the atmospheric temperature further making
conditio ns for the ecology difficult. Flora andfauna across the world
are accustomed to their habitat. This haphazard clearance of forest
has forced several of these anim als to shift from their native
environment. Due to this several species are finding it difficult to
survive or adapt to new habitats.
2.Increase inGlobal Warming: Trees play a major role in
controlling global warming . The trees utilize the greenhouse gases ,
restoring the balance in the atmosphere. With constant
deforestation, the ratio of green house gases in the atmosphere has
increased, adding to our global warming woes.
3.Soil Erosion: Also, due to the shade of trees the soil remains
moist. With the clearance of tree cover, the soil is directly exposed
to the sun, making it dry.
4.Floods: When it rains, trees absorb and store large amount of
water with the help of their roots. When they are cut down, the flow
of water is disrupted and leads to floods in some areas and
droughts in other.
 Management of Forest Resource :
The management of forests is often referred to
asforestry .Forest management has changed considerably o ver
the last few centuries, with rapid changes from the 1980s onwards
culminating in a practice now referred to as sustainable forest
management . Forest ecologists concentrate on forest patterns and
processes, usually with the aim of elucidating cause -and-effect
relationships.
India has a long history of traditional conservation and forest
management practices. Under British rule, forest managem ent
systems were set in place mainly to exploit forests. Nonetheless,
there were some attempts to conserve forests and meet the needs
of local communities. The Indian National Forest Policy of 1894
provided the impetus to conserve India’s forests wealth wi th the
prime objectives of maintaining environmental stability and meeting
the basic needs of the fringe forests user -groups. Consequently,
forests were classified into four broad categories, namely forests for
preservation of environmental stability, fore sts for providing timber
supplies, forests for minor forest produce, and pasture lands. While
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were designated as protected forests and managed in the interests
of the local communities.
Soon after independence, rapid development and progress
saw large forest tracts fragmented by roads, canals, and townships.
There was an increase in the exploitation of forest wealth. In 1950
the Government of India began the annual festival of tree plantin g
called the Vanamahotsava. Gujarat was the first state to
implement it. However, it was only in the 1970s that greater
impetus was given to the conservation of India's forests and wildlife.
India was one of the first countries in the world to have introdu ced a
social forestry programme to introduce trees in non -forested areas
along road sides, canals, and railway lines.
Since 1991, India has reversed the deforestation trend.
Specialists of the United Nations report India's forest as well as
woodland cover has increased. A 2010 study by the Food and
Agriculture Organization ranks India amongst the 10 countries with
the largest forest area coverage in the world. From 1990 to 2000,
FAO finds India was the fifth largest gainer in forest coverage in the
world; while from 2000 to 2010, FAO considers India as the third
largest gainer in forest coverage. Some 500,000 square kilometres,
about 17% of India 's land area, were regarded as Forest Area in
the early 1990s. In FY 1987, however, actual forest cover was
640,000 square kilometers, which is 19.45% of the total
geographical area.
 Some steps towards the conservation of forest
reso urce :
Following are some important steps of forest conservation:
1. Regulated and Planned Cutting ofTrees :One of the main
reasons of deforestation is commercial felling of trees. According to
an estimate, about 1,600 million cubic metres of wood have been
used for various purposes in the world. Cutting oftress should be
regulated byadopting methods like: (i) Clear cutting and (ii)
Selective cutting. The clear -cutting method is useful for those areas
where the same types of trees are avai lable over a large area. In
that case, trees of same age group can be cut down in a selected
area and then marked for re -plantation. In selective cutting only
mature trees are selected for cutting. This process is to be followed
in rotation. The time gap b etween these cuttings is helpful in re -
growth of trees. In regulated cutting only one -tenth of the forest
area is selected for use and rotational system is always followed for
their protection. The forest can be managed in such a way that a
timber crop may be harvested indefinitely year after year without
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2. Reforestation and Afforestation: Afforestation is the
planting of trees in an area where there was no forest.
Reforestation is the reestablishment of forest cover, either naturally
or artificially. So, reforestation and affore station are both
forestation. Many governments and non -governmental
organizations directly engage in programs of afforestation to
increase the forest cover.
3. Protection ofForests: The existing forests should be
protected. Apart from commercial cutting, uno rganised grazing is
also one of the reasons. There are several forest diseases resulting
from parasitic fungi, rusts, mistletoes, viruses and nematodes which
cause the destruction of trees. The forests should be protected
either by use of chemical spray, a ntibiotics or by development of
disease resistant strains of trees.
4. Proper Utilisation ofForest and Forests Products:
Generally, trees are cut for logs and the rest, including stump,
limbs, branches and foliage, etc., is left out as worthless debris.
Further waste occurs at the saw mills. There is thus need to utilise
this waste material. Today, several uses have been dev eloped and
products like waterproof glues, etc., can be obtained. Similarly,
forests can be used or developed as tourist centers. By using them
as tourist centers the country can earn substantial foreign
exchange. This practice has been adopted by many cou ntries, both
developed and developing. The concepts of ‘national park’ and
‘game sanctuary’ have now become popular and every country has
developed its unique forest area as a ‘national park’. In India alone,
there are as many as 92 national parks and game sanctuaries. This
is a good method of forest conservation.
5. Control forest fires: Forest must be protected from forest
fires. In 2016, forest fires have been noted numerous places across
the Indian state of Uttarakhand . These fires, set mainly in pine
forests in the slopes of the sub -Himalayan region, produced clouds
of smoke. Ea rliest possible steps should be taken to control the
forest fires.
6. Role ofGovernment inForest Conservation :Although the
government of every country is very particular about conservation
of its forest resources and has several rules and laws for the
protection of forests but, they are not implement edin an effective
manner. Government should take the steps to control the
commercial logging. They can implement the high amount of taxes
over commercial logging .
7. Increase the use of substitute products: Increase the use
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the place of wooden furniture we can use plastic or iron furniture.
Use of paper can be minimized by using the technology.
 Energy Resources:
Our life is dependent on energy resources. Energy is the
capacity to do work and i s required for life processes.
An energy resource is something that can produce heat,
power life, move objects, or produce electricity. Most of the energy
we use today comes from fossil fuels.But fossils fuels have a
disadvantage in that they are non -renew able on a human time
scale, and responsible for other potentially harmful effects on the
environment. Therefore, the gap creates between increasing
demand and less supply. This gap is called ENERGY CRISIS .
The energy crisis is the concern that the world ’s demands on
the limited natural resources that are used to power industrial
society are diminishing as the demand rises. These natural
resources are in limited supply. While they do occur naturally, it can
take hundreds of thousands of years to replenish the stores.
Governments and concerned individuals are working to make the
use of renewable resources a priority, and to lessen the
irresponsible use of natural supplies through increased
conservation.
The energy crisis is a broad and complex topic. The e nergy
crisis is something that is ongoing and getting worse, despite many
efforts. The reason for this is that there is not a broad
understanding of the complex causes and solutions for the energy
crisis that will allow for an effort to happen that will re solve it.It
would be easy to point a finger at one practice or industry and lay
the blame for the entire energy crisis at their door, but that would be
a very naive and unrealistic interpretation of the cause of the crisis.
 Overconsumption: The energy crisis is a result of many
different strains on our natural resources, not just one. There is a
strain on fossil fuels such as oil,gas and coal due to over
consumption.
 Overpopulation: Another cause of the crisis has been the
steady increase in the world’s population and its demands for fuel
and products. Transport sectors have developed a lot and
increased their fuel consumption.
 Poor Infrastructure: Aging infrast ructure of power
generating equipment is yet another reason for energy shortage.
Most of the energy producing firms keep on using outdated
equipment sthat restrict the production of energy. It is the
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 Unexplored Renewable Energy Options: Renewable
energy still remains unused in most of the countries. Most of the
energy comes from non -renewable sources like coal. It still remains
the top choice to produ ce energy. Unless we give renewable
energy a serious thought, the problem of energy crisis cannot be
solved.
 Gap between demand and supply: In few countries, there
is a significant delay in commissioning of new power plants that can
fill the gap between demand and supply of energy. The result is
that old plants come under huge stress to meet the daily demand
for power. When supply doesn’t match demand, it results in load
shedding and breakdown.
 Wastage of Energy: In most parts of the world, people do
notrealize the importance of conserving energy. It is only limited to
books, internet, newspaper ads, lip service and seminars. Unless
we give it a serious thought, things are not going to change anytime
sooner. Simple things like switching off fans and ligh ts when not in
use, using maximum daylight, walking instead of driving for short
distances, using CFL instead of traditional bulbs, proper insulation
for leakage of energy can go a long way in saving energy.
 Poor Distribution System: Frequent tripping an d
breakdown are result of a poor distribution system.
 Major Accidents and Natural Calamities: Major accidents
like pipeline burst and natural calamities like eruption of volcanoes,
floods, earthquakes can also cause interruptions to energy
supplies. The h uge gap between supply and demand of energy can
raise the price of essential items which can give rise to inflation.
 Wars and Attacks: Wars between countries can also
hamper supply of energy specially if it happens in Middle East
countries like Saudi Arab ia, Iraq, Iran, Kuwait, UAE or Qatar. That’s
what happened during 1990 Gulf war when price of oil reached its
peak causing global shortages and created major problem for
energy consumers.
 Others Factors: Tax hikes, strikes, military coup, political
events , severe hot summers or cold winters can cause sudden
increase in demand of energy and can choke supply.
 Some steps towards the conservation of Energy
Resources:
 Move Towards Renewable Resources: The best possible
solution is to reduce the world’ s dependence on non-renewable
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industrial age was created using fossil fuels, but there is also
known technology that uses other types of renewable energies –
such as steam, solar and wind. The Switching over to renewable
resources is the important solution of energy crisis.
 Awareness ofBuying Energy Efficient products: Replace
traditional bulbs wi th CFL’s and LED’s. They use less watts of
electricity and last longer. If millions of people across the globe use
LED’s and CFL’s for residential and commercial purposes, the
demand for energy can go down and an energy crisis can be
averted.
 Energy Simul ation: Energy simulation software can be
used by big corporate and corporations to redesign building unit
andreduce running business energy cost. Engineers, architects
and designers could use this design to come with most energy
efficient building and reduce carbon footprint.
 Perform Energy Audit: Energy audit is a process that helps
you to identify the areas where your home or office is losing energy
and what steps you can take to improve energy efficiency. Energy
audit when done by a professional can help you to reduce your
carbon footprint, save energy and money and avoid energy crisis.
 Aware ness onClimate Change: Both developed and
developing countries should adopt a common stand on climate
change. They should focus on reducing greenhouse gas emissions
through an effective cross border mechanism. With current
population growth and over consu mption of resources, the
consequences of global warming and climate change cannot be
ruled out. Both developed and developing countries must focus on
emissions cuts .To cut their emission levels to half from current
levels by 2050.
There are many global i nitiatives that are working towards
resolving the energy crisis. This has taken the form of increased
regulation and restriction on carbon emissions, the promotion of
greener manufacturing and construction projects, the funding of
research into hybrid tech nologies and more sustainable
technologies and more.
2.11 RESOURCE UTILIZATION AND SUSTAINABLE
DEVELOPMENT:
The name sustainability is derived from
theLatin sustinere (tenere, to hold; sub, up). Sustain can mean
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sustainability has been used more in the sense of human
sustainability on planet Earth.
Sustainable development is a process for meeting human
development goals while sustaining the ability of natural system s to
continue to provide the natural resources andecosystem services
upon which the economy and society depend. As the concept
developed, it has shifted to focus more on economic development ,
social development andenvironmental protection .
Sustainable development is the organizing principle for
sustaining finite resources necessary to provide fo r the needs of
future generations of life on the planet. It is a process that envisions
a desirable future state for human societies in which living
conditions and resource -use continue to meet human needs
without undermining the "integrity, stability and beauty" of natural
biotic systems .
There are many different definitions of the term sustainable
development but in 1987 the World Commission on Environment
and Development’ s report called the Brundtland Report is by far the
best and is now one of the most widely recognized definitions:
“Sustainable deve lopment is development that meets
the needs of the present without compromising the ability of
future generations to meet their own needs”.
The world’s resources are finite, and growth that is
unmanaged will lead to increased poverty and decline of the
environment. We owe it to future generations to explore lifestyles
and paths of development that effectively balance progress with
awareness of its environmental impact. In order to preserve the
future, we must appreciate the interconnectedness between
humans and nature at all levels. Sustainable development
practices can help us do this, and through education and building
awareness, preserving the future is within everyone’s reach.
Some of the more common examples of sustainable
development practices are:
 Use of Renewable Energy : Energy from these resources is
limitless, meaning we have the ability to eliminate dependence on
non-renewable power sources by harnessing power from
renew able resources.
 Crop rotation . Many farmers and gardeners are using this
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 Water fixtures .Water conservation is critical to sustainable
development , and more and more products are available that use
less water in the home, such as showers, toilets, dishwashers and
laundry system.
On September 25th 2015, countries adopted a set of goals
toend poverty ,protect the planet , and ensure prosperity for
allas part of a new sustainable development agenda . Each goal
has specific targets to be achieved over the next 15 years. For the
goals to be reached, everyone needs to do their part: governments,
the private sector, civil society and people.
2.12 SUMMARY
We use a variety of materials derived from the environment.
Nature has given us abundant resources in form of water, air, soil,
wild animals, metals , fossils, fuels etc. and man by his technical
skill and knowledge using resource from the dawn of civilization.
Resource is the ability to perform the work of satisfying the needs
or wants of human being. Resource can be classified on the basis
of their n ature, durability, ownership and distribution pattern. All the
resources are derived from the environment . Many natural
resources are essential for human survival, whi le others are used
for satisfying human desire. Conservation is the protection,
improvement, and wise use of natural resource to provide the
greatest social and economic value for the present and the future.
“Sustainable development is development that mee ts the needs of
the present without compromising the ability of future generations
to meet their own needs”. On September 25th 2015, countries
adopted a set of goals to end poverty ,protect the planet ,
andensure prosperity for all as part of a new sustainable
development agenda . Each goal has specific targets to be achieved
over the next 15 years. For the goals to be reached, everyone
needs to do their part: governme nts, the private sector, civil society
and people.
2.13 CHECK YOUR PROGRESS/EXERCISE
1. True or false:
a.Sustainable development is development that meets the needs
of the present without compromising the ability of future
generations to meet their own needs
b.Only developing countries should adopt a common stand on
climate change
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d.Most of the time developing countries not able to explore the
new re sources due to low amount of financial support.
e.A resource is something that satisfies the needs of the nature.
2. Fill in the blanks:
a.On_____________, countries adopted a set of goals to end
poverty ,protect the planet , and ensure prosperity for all .
b._________________are formed over very long geological
periods
c.One limitation to maximize resources is ________________
d.____________________play an important role in resour ce
development.
e.______________energy sources do not require heavy
expenditure.
3. Match the columns:
A B
a.Renewable
resources1.Chemical free way to reduce
diseases
b.Non-renewable
resources2.Pine, spruce and larches
c.Crop rotation 3.Solar power
d.Taiga forest 4.Degradation of water due to
temperature changes
e.Rainwater
harvesting5.All plant material and animal
excreta
f.Thermal pollution 6.Hydrogen
g.Geothermal energy 7.Coal
h.Biomass 8.Logging
i.Stock resource 9.Heat of earth’s interior
j.Deforestation 10.Accumulation and deposition of
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2.14 ANSWERS TO THE SELF -LEARNING
QUESTIONS
1. True or False:
a. True
b. False
c. True
d. True
e. False
2. Fill in the blanks:
a. September 25th 2015
b. Non-renewable resources
c. Technology
d. Governmental policies
e. Non-conventional
3. Match the columns:
a. 3
b. 7
c. 1
d. 2
e. 10
f. 4
g. 9
h. 5
i. 6
j. 8
2,14 TECHNICAL WORDS AND THEIR MEANING
Resources: a stock or supply of money, materials, staff, and
other assets that can be drawn on by a person or organization
in order to function effectively.
Conservation: Conservation is the efficient using of resources
in an efficient or ethical manner.
Exploitation: The action of making use of and benefiting from
resources, over use of the resources.
2.15 TASK
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2.16 REFERENCES FOR FURTHER STUDY
Natural Resource Management, Pandey, B ed.
The Exploitation of Natural Resources and the Consequences,
Sarsby, R. eds.
A New Century for Natural Resources Management, Knight. et.
al. eds.
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Unit -3
POPULATION AND EMERGING ISSUES
OF DEVELOPMENT
After going through this chapter, you will be able to understand the
following features:
3.1 Objectives
3.2 Introduction
3.3 Subject discussion
3.4 Population Explosion
a.Demographic concepts
b.Population Explosion in the World and India
3.5 Demographic Transition Model
3.6 Pattern of Population Growth
3.7 Problems of Excess Population
3.8 Population Control Measures in India
3.9 Human Population and environment
3.10 Environm ent and human health
3.11 HDI
3.12 World Happiness Index
3.13 Summary
3.14 Check your Progress/Exercise
3.15 Answers to the self -learning questions
3.16 Technical words and their meaning
3.17 Task
3.18 References for further study
3.1OBJECTIVES
By the end of this unit you will be able to –
Understand the importance of human resources in
environment
Understand the need to have an optimum population in the
world
Understand the benefits and challenges of population
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3.2 INTRODUCTION
The study of environment is incomplete without
understanding the role man plays in nature. As the population
numbers are increasing in the world, the resources are becoming
scarce and therefore the onus of controlling pop ulation has
emerges as a major step for mankind. Countries like China have
effectively introduced the one child model and reduced their
population, while most developing countries like India are struggling
with the population.
Fig. 3.1 One Child Policy
Population growth and development are linked in complex
ways. Economic development generate s resources and revenue
which is used to improve education and health. These
improvements, along with related social changes can moderate and
reduce both fertility and mortality rates. On the contrary, high rates
of population growth put excess pressure o n the existing resources
hindering the economic and social development and in turn
education and health.
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3.3 SUBJECT DISCUSSION
Population is the most integral part of environment and
needs to be studied in detail as it has the capacity to alter all other
components of environment. The population in the world and also
in India is growing rapidly almost touching a 7 billion mark and with
a global projection of 8 billion by 2020.
The human perspective in nature is of three broad kinds -
Domination -where human domination of nature is prevalent
Stewardship -development of an exploitative view, more
harmonious relationship between human and environment
and is desirous relation.
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Romanticism or deep ecology -has love for nature and
intrinsic value for all forms of life is the idealistic form of man
nature relation.
Population can be a bless ing as well as a bane for a nation.
Why is Population Beneficial Why is Population a Hindrance
Greater consumer base
Large workforce
Greater diversity
Wider and broader political
machinery
Greater potential to use
resourcesExcessive pressure on existing
resources -medical,
educational, infrastructure
Poor Developmental Index -
housing, sanitation, drinking
water
Social problems -
Dissatisfaction with the
governments due to limited
funds
3.4 POPULATION EXPLOSION
a. Demographic terms to know -
Demography is the population of a place and the features it
represents. It includes the Growth of population, Sex Ratio,
Density of population, Literacy rate, Distribution of
population, Poverty, Age -Sex Ratio and many other
parameters.
Census is the decadal count of population of the country
which is tabulated in a country to understand the related
trends of the country. In India the first census was conducted
in the early 19thcentury by the British
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Sex Ratio 1500
Literacy -The ability of a person to read and write with
understanding. Literacy rate is the number of people who are
literate.
Density of Population –is the number of persons living per
square kilometer in an area.
Age Sex Pyramid -is a statistical representation of the
percentage of males and females in a mirror graph based on
the specified age groups, e.g., 0 -10years etc.
b. Population Explosion
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The distribution of population in the w orld has shown wide
fluctuations which has been evident in the manner of growth of
population. It is estimated that at the time of Christ the human
population was only 200 to 300 million(Hussain). The last 10,000
years the population has galloped in two d istinct phases, the
agricultural revolution and industrial revolution. The last two
centuries, the doubling of population happened for the whole world.
The sharp increase in population is reflected in the J curve or the
almost steep rise of population in t he last few decades. Currently
the population in the world stands at 6.4 billion and estimates
suggest it would be 8 billion by 2020.
The causes for the growth of population and also for
population explosion are :-
Pover ty-Has been the most important cause of population
growth. Poor people have more children to help them support
their families with working hands. Lack of advancement in
medicine and other social benefits have made them suffer in the
developmental system o f the country.
Illiteracy -Education is a key enabler to help handle population
increases. Lack of awareness, poor adaptability to the
development goals make them susceptible to being excluded
from the development indices.
Infant Mortality -Poor medical facilities result in high infant
mortality and the people tend to have more children as the
survival rates of the infants are low.
Social Customs -Social customs like early marriage, poor
position of women in society,preference for the male child,
selecte d female infanticide in some states are reasons for the
explosion of population in the world.
Migration and Immigration -Just like there is natural increase
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population that happens through m igration of people from one
country, state, region to another.
Fig. 3.11 Growth of Population due to Migration
Medical Facilities -Improved medical facilities have resulted in
falling death rate which have increased the l ongevity of the
people, life expectancy and reduced infant deaths too. This has
lead to an increase in population.
Fig. 3.12 Improved Medical Facilities
3.5.DEMOGRAPHIC TRANSITION MODEL
All countries in the world are in different stages of
development. These stages are determined by the selected criteria
that have been made by social scientists to stage the economic
development of the country. One of the most popular model is the
Demograp hic Transition Model.This model was propounded by
W.S.Thompson (1929) and Frank W. Notestein(1945).It is based
on the fertility and mortality trends in Europe, America and
Australia. It analysed the birth rate and the death rate of all
countries and arriv ed at a conclusion as to which stage the
economy is. It shows the transition of an economy from an agrarian
to urban modern society.
 This is a model based on the gradual progression of society
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 The model has three broad phases: -
a. Phase I -This is the stage of high underdevelopment and
agrarian community with subsistence. It is characterized by high
birth rate and high fluctuating death rate (pre demographic
transition stage). The st age is characterized by poor medical
facilities, subsistence living, lack of industrial activity, poor
educational standards and overall underdevelopment.
b. Phase II -This stage is characterized by high birth rate and
high but declining death rate, also the phase of population
explosion (most under developed to developing countries would fall
in this category). This is a stage of improved health care facilities
which bring down the death rate and the IMR to cause population
growth when the two curves diverge. Improved education,
awareness and governmental efforts gradually enable the growth
rates to fall. Some advanced models further subdivide this phase
into three, Stage of falling birth and death rate, stage of sharper fall
of death rate and a modes t reduction of birthrate and maximum
population growth, and the stage of falling and stable death rate
and a sharp falling birth rate.
c. Phase III -This is the last stage of the model which is
characteri zed by low but fluctuating birth rate and low death rate
which can be found in all developed countries.
The Demographic Transition Model
Fig. 3.13 Demographic Transition Model
3.6 PATTERN OF POPULATION GROWTH
 In 1901 the world population was only 1.6 billion.
 By 1960, it was 3 billion, and by 1987, 5 billion and in 1999, 6
billion.
 During the last decade there has been substantial decline in
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Reasons for decline in Birth Rate
a.Urbanization
b.rising educational attainment
c.increasing employment among women
d.lower infant mortality
e.increasing awareness and
f.improved access to contraception have made it possible
for the majority of the couple to achieve the desired family
size.
 In some countries slowing of the population growth has been
due to an increase in mortality (e.g. HIV related mortality in
sub-saharan Africa).
 As a result of all these the decline in the globa l population
growth during the nineties is steeper than the earlier
predictions.
 It is expected to decrease to about 64 million by 2020 -25 and
to 33 million by 2045 -50; 95 % of the growth of population
occurs in developing countries.
 The population dist ribution is highly uneven. About 75 % of the
people in the world live in less than 15% of the area while the
rest 25% is spread all over.
 Global density of the world is about 35 persons per square
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square kilometer. These variations are dependent on the
physical factors, economic factors and the overall
development of a places.
Fig. 3.16 Population Density -Global average & Asia
3.7 PROBLEMS OF EXCESS POPULATION
Rapid population growth is followed by increase in air, water
pollution as more and more people use and contaminate the
environment. There are in creased demands for food and hence
agriculture is carried out extensively. These may impact the quality
of land by over use and over irrigation. All resources may be
strained with overuse. Insufficient housing, overcrowding, transport
related road clogging may also result. Excess urbansiation and
migration from the rural areas may cause cities to overflow with
people. Unsanitary conditions, poor sanitation and inadequate
drainage may create unhealthy urban living. Rural areas may see
disguised unemployment and productivity of the lands will fall.
Malnutrition and starvation may be seen in areas where the food
resources have not been distributed properly.Socially,
unemployment, crime and unrest will result.
Summarizing the challenges of rising population: -
Fig. 3.17 Challenges of rising Population
Environmental stress
Resource degradation, depletion and resource crunch
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Poor Disaster preparedness
The Planning Commission in its Report on “Population
Growth Trends and Challenges” outlined the following ecological
adverse impacts of excess population on India: -
a.Severe pressure on the forests due to both the rate of resource
use and the nature of use. The per capita forest biomass in the
country is only about 6 tons as against the global average of 82
tons.
b.Adverse effect on species diversity
c.Conversion of habitat to some other land use such as
agriculture, urban development, forestry operation. Some 7 0-80
% of fresh water marshes and lakes in the Gangetic flood plains
has been lost in the last 50 years.
d.Tropical deforestation and destruction of mangroves for
commercial needs and fuel wood. The country’s mangrove
areas h ave reduced from 700,000 ha to 453,000 ha in the last
50 years.
e.Intense grazing by domestic livestock
f.Poaching and illegal harvesting of wildlife.
g.Increase in agricultural area, high use of chemical fertilizers
pesticides and weedicides; water stagnation , soil erosion, soil
salinity and low productivity.
h.High level of biomass burning causing large -scale indoor
pollution.
i.Encroachment on habitat for rail and road construction thereby
fragmenting the habitat. increase in commercial act ivities such
as mining and unsustainable resource extraction.
j.Degradation of coastal and other aquatic ecosystems from
domestic sewage, pesticides, fertilizers and industrial effluents.
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l.Diversion of water for domestic, industrial and agricultural uses
leading to increased river pollution and decrease in self -cleaning
properties of rivers
m.Increasing water requirement leading to tapping deeper aquifers
which have high content of arseni c or fluoride resulting health
problems.
n.Disturbance from increased recreational activity and tourism
causing pollution of natural ecosystems with wastes left behind
by people.
3.8. POPULATION CONTROL MEASURES IN INDIA
The population policy in India is a fallout of the plan periods
and has achieved modest results. As the country stands as the
second populous country and has over a billion population, the
policies have to be implemented really effectively for any desired
benefits.
Important Milestones in of the
Population Policy of India1946 -Bhore Committee
Report
1952 -famil y planning
programme launched1976 -National Policy
Statement
1977 -Family Welfare
Programme policy
statement1991 -Karunakaran
committee( NDC)
1993 - Karunakaran
report accepted as the
NPP1994 -Dr.Swaminathan
Expert report -on population
policy
1998 -99-opinions sought
on the policy2000 -accepted as the new
NPP
National Population Policy -2000
The NPP is implemented by the National Commission on
Population and has been attempting to stabilize the population of
the country with the help of the following measures: -
Infrastructure for basic reproductive and child health
School education upto 14 yr s
Reduction of the IMR to below 30 persons /100 live births
Reduction of the maternal mortality to below 100/100000 live
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Achieve universal immunization of children against all
preventive diseases
Achieve 80% institutional deliveries and by trained p ersons
Universal access to information ,counseling, contraception
Achieve 100% registration of births and deaths and marriage
Contain AIDS, communicable diseases
Promote small family norms
Make emphasis on people centric program National Population
Policy -2000
Objectives of the Policy
a.Long Term Objectives -i) stable population by 2045
ii)sustainable economic growth with social and environmental
development
b.Medium Term Objectives -Inter sectoral operational strategies to
enable achievement of the policy objectives
c.Short Term Objectives -Meet the medical and health care needs
Evaluation of the Policy
NPP has been operational and implemented for more than two
decades. Yet the success rate is poor. Reasons for low success
are:
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Poverty
Illiteracy
Religion
Lack of motivation
Low status of women
Poor implementation
Voluntary and hence slow
The NPP however, reaffirms the government ’s determination
to reduce the population numbers. Health facilities may have
improved yet there are several areas in the country where there are
limited or no facilities. Education has be en boosted with right to
education, mid day meal schemes, freeship for the girl child etc. to
enable inclusiveness. Awareness and penetration of neonatal and
infant care has improved.
3.9. HUMAN POPULATION AND ENVIRONMENT
Concept of the Carrying Capacity and the Tragedy of
Commons: Garret Hardin in his classic essay “tragedy of commons”
in 1968, stressed that every ecosystem has a threshold or a limit of
supporting the population. This is determined by the amount of
respuce s and the dependable population in the area. Whether
population increases by natural increase or migration, beyond a
certain limit there is experience ofstress. This ideal numbers which
any environmental space can hold without any damage to the
environmen t is called the carrying capacity of the ecosystem or the
environment. He explained this in his famous essay Tragedy of
Commons .
The study of human population is important for the following
reasons,
a. Man is an integral part of the environment
b. Has a dual role as a producer and consumer of resources
c. The changing roles of man in nature from dependency to
supremacy
d. Maintain a harmony in the environment
There are three types of activities that are carried on by man
to alter and create resources. T hey are, Primary activities like
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3.10 ENVIRONMENT AND HUMAN HEALTH
The relation between health and environment is indeed
interesting. The presence of greater number of people in an area
causes health problems that need to be studied. Overcrowding
leads to shortages, which in turn, may cause unequal distribution of
medical and other necessary resources. The rate of population
growth affects long -range planning of community health and
medical facilities. Also any changes in age composition, migration
changes in population density and urban -rural movement may
result in changing the entire health program of an area. In
advanced nations population trends like aging of the population is
the most fundamental aim on their national health
policy. Environmental health, as defined by WHO, comprises those
aspects of human health, including quality of life, that are
determined by physical, chemical, biological, social, and
psychosocial factors in the environment. It also refers to the theory
and practi ce of assessing, correcting, controlling, and preventing
those factors in the environment that adversely affect the health of
present and future generations.( Bharucha)
Our environment affects health in a variety of ways .
Climate and weather affect human health.
Public health depends on sufficient amounts of good quality
food, safe drinking water, and adequate shelter
Natural disasters such as storms, hurricanes, and floods still kill
many people every year. Unprecedented rainfall trigger
epidemics of malaria and water borne diseases.
Food Shortages and resulting Poverty
Spread of diseases and combating them
Definition of Health Impact Assessment (HIA) by World
Health Organisation: Health impact assessment is a combination of
procedures, methods and tools by which a policy, program or
project may be judged as to its potential effects on the health of a
population, and t he distribution of those effects within the
population Concerns in Diseases due to unregulated health in
highly populated areas
i.Infectious diseases -Those that spread through direct
contact. Tuberculosis has a virulent strain which is highly
contagious.
ii.Vector Borne -Those that spread by carrier vectors like
rodents, mosquito, like malaria, leptospirosis.
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iv.Mutated Varieties -All virus spread diseases which have
mutated such a s the flu, avian flu
v.Inoculations and Vaccination issues -As the whole world
have irradiated diseases like yellow fever and small pox;
inoculations have to be made to ensure that they are in check.
A good example is that of polio which was a drop administer ed
inoculation has move to become injected one to make it more
effective. Congested and overpopulated areas can be a
problem in the ability of the administration to reach out to all
section of the society. Some of these may reoccur if not
administered on t ime. Awareness and education of the people
has to be made to ensure that the timely administering of the
drugs occur.
3.11 HUMAN DEVELOPMENT INDEX (HDI)
Is a measure of development in the world. It has been
introduced by the UNDP to emphasize the level of development of
the countries. It was introduced by Prof Amartya Sen, Lord
Meghnad Desai And Dr.Mahabubul Haq. The objective of the
ranking index is to enable the society to lead a quality life.
 The parameters of the HDI as measured are: -
1. Life span
2. Literacy
3. Income per Capita for quality of life
The Human Development Index (HDI) is a summary
measure of average achievement in key dimensions of human
development: a long and healthy life, being knowledgeable and
have a decent standard of living. It is calculated as a geometric
mean of normalized indices for each of the three dimensi ons. The
health dimension is assessed by life expectancy at birth, the
education dimension is measured by mean of years of schooling for
adults aged 25 years and more and expected years of schooling for
children of school entering age. The standard of livi ng dimension is
measured by gross national income per capita. The HDI uses the
logarithm of income, to reflect the diminishing importance of income
with increasing GNI.
Much later in 1995, t heGender Development Index (GDI)
was introduced as an index tomeasure of gender equality. GDI
together with the Gender Empowerment Measure (GEM) were
introduced in 1995 in the Human Development Report of the
UNDP .
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Human Development Report 20th anniversary edition by the United
Nations Development Programme (UNDP).
Name of the
CountryHDI Rank 2015,
released in 2016Index
Norway 1 0.94
Australia 2 0.93
Switzerland 3 0.93
India 131 0.62
India falls in the medium developed countries in the world.
Most livable Countries in the world today remain the
Scandinavian countries and the Western European Countries
such as Norway, Iceland, Sweden, Austria, Netherlands,
Belgium, US A, Canada, Japan, Switzerland, Denmark, Ireland,
UK, etc
Least Livable Countries -Sierra Leone, Niger, Burkina Faso,
Mali, Burundi, Mozambique etc.
HDI in Indian states
The HDI is the highest for Kerala (0.625) followed by Punjab
(0.569) and the lowest for Orissa(0.569) while Bihar (0.447)
and Chhattisgarh (0.449) .Maharashtra has (0.549) .
3.12 WORLD HAPPINESS INDEX
In 2012 ,the World introduced the World Happiness In dex
.The report is generated from a survey of the state of global
happiness. The World Happiness Report 2017 ,which ranks 155
countries by their happiness levels, was released in March, 2017
and ranked India 122 out of 155 nations. In June 2016, the OECD
worked to “to redefine the growth narrative to put people’s well -
being at the center of governments’ efforts” .In February 2017, the
United Arab Emirates held a full -day World Happiness meeting, as
part of the World Government Summit.Thereafter, on World
Happiness Day, March 20th, the launch the World Happiness
Report 2017 was made. Norway has jumped from 4th plac e in 2016
to 1st place this year, followed by Denmark, Iceland and
Switzerland. 80% of the variance of happiness across the world
occurs within developed countries. In richer countries the
differences are not by income inequality, but by differences in
mental health, physical health and personal relationships: the
biggest single source of misery is mental illness. Income
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3.13 SUMMARY
Demographic studies are an import ant determinant of the
study of environment. Previously man was highly dependent on
nature but as he progressed technologically, he lea rned to combat
the uncontrollabl e natural forces. This helped him todevelop and
confront the many natural forces. Gradua lly societies progressed
from agrarian to urban and the environmental degradation began.
Just as excess population can be a hinderance, under population
too can result in underdevelopment. Hence the scope of the study
become more and more defined as man al so learns to improve the
quality of living through human development and sustainable
development.
3.14.CHECK YOUR PROGRESS/EXERCISE
1.True or False
a.India ranks 105 in the World Happiness Index.
b.The global population is currently at 8 billion.
c.India falls in the Phase 1 of the DTM
d.India follows no defined policy on population control
e.Census is collected every 5 years.
2.Fill in the Blanks
a.India ranks _____in the World Happiness Index
b.________is a parameter for HDI
c.____________ state in India has the highest HDI .
d.MDGs stand for___________
e.NPP stands for ________________.
3.Multiple Choice Questions
a. Concept of Carrying Capacity was given by
i. T. Malthus
ii. Garret Hardin
iii. Odum
iv. A Zimmerman
b. DTM has _____phases .
i. One
ii. Two
iii. Three
iv. four
c. Human population rose sharply during the _____________.
i. Paleolithic
ii. Neolithic
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d. Global population is highly concentrated in which continent
_____
i. Asia
ii.Africa
iii.Europe
iv. Australia
e. ________ has the largest population in the world.
i.India
ii.China
iii. Brazil
iv. Australia
3.15 ANSWERS TO THE SELF -LEARNING
QUESTIONS
1. True or False
1.a. False
1.b. False
1.c. False
1.d. False
1.e. False
2. Fill in the Blanks
2.a. 122
2.b. Longivity
2.c. Kerala
2.d. Millinium Development Goals
2e. National Population Policy
3. Multiple Choice Questions
3.a. (ii)
3.b. (iii)
3.c. (iii)
3.d. (i)
3.e. (i)
3.16 TECHNICAL WORDS AND THEIR MEANINGS
Census -The decadal compoting of demographic data in a
country .
TheGender Inequality Index (GII) is an index for
measurement of gender disparity that was introduced in the
2010 Human Development Report 20th anniversary edition by
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3.17 TASK
Make a questionnaire for the students in your class and find out
the following: -
-Literacy level in their families
-Awareness about girl child education
-RTE
3.18 REFERENCES FOR FURTHER STUDY
Basics in Environmental Studies, Dr .Pushpendra
Environmental Management, Swapan Deb.
Human Geography, Majid Hussain.
Environment and Sustainable Development, Sundar, I.
World Development Report -Annual
Census of India, 2011.
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Unit -4
URBANIZATION AND ENVIRONMENT
After going through this chapter, you will be able to understand the
following features:
4.1 Objectives
4.2 Introduction
4.3 Subject discussion
4.4 Concept of Urbanization
a. Defining the concepts
b.Trends in India Urbanisation
c. Causes of Urbanisation
4.5 Problems of Migration and urban environment :
i) What is Migration
ii) Types of Migration
iii) Effects of Urbanisation
a.Changing land use
b. Crowding and stress on urban resources
c. Degradation of air and water
d. Loss of soil cover impact on biodiversity
4.6 Urban Heat Island
4.7 Smart and Sustainable Cities
i) What is a Smart City
ii) Smart City Mission
iii) Achievements of a Smart city
iv) Smart City Features
v) Smart City Area Based Development Models
vi) Challenges of a Smart City
4.8 Summary
4.9 Check your Progress/Exercise
4.10 Answers to the self -learning questions
4.11 Technical words and their meaning
4.12 Task
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4.1OBJECTIVES
By the end of this unit you will be able to –
 Understand the patterns of global urban growth
 Understand the problems of excess urbanization
 Understand the concept of smart cities
 Understand the patterns of urban population
4.2 INTRODUCTION
Urbanisation is the process of becoming urban. All regions
have moved from a rural to an urban population growth causing
cities to change their morphology and the characteristics.
As cities become more and more urban, there are problems
that have arisen like pollution, overcrowding etc. These have called
for better planning and management of the urban morphology.
Planners and governing agencies have created solutions like smart
cities, sustainable cities to ensure that cities continue to grow.
Projections show that urbanization combined with the overall
growth of the world's population could add another 2.5 billion
people to urban populations by 2050, with close to 90 percent of
theincrease concentrated in Asia and Africa, according to the
United Nations.
4.3 SUBJECT DISCUSSION
According to the World Bank data, in 2007, the global urban
population exceeded the global rural population, and the world
population has remained predominantly urban thereafter .With
more than 54 per cent of the world’s population is urban today
planning for urbanization is a much needed action. India just like
many other d eveloping countries too is increasing becoming urban.
Urban areas promote employment, better quality life, improved
medical and educational opportunities, create infrastructure and
push economies into becoming better. The pitfalls to urbanization
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pollution, infrastructure bottlenecks and overcrowding. In order to
combat this the Indian government has come up with the concept of
smart cities to align with the Rio 20+ objectives of improved urban
development. Selected cities in the country will be modeled into
ideal smart cities and the process has begun.
4.4 CONCEPT OF URBANIZATION
a. Defining Terms
The Census of India defines urban areas as, (as per 1961
Census later adopted in every Census)
(a)All places with a Municipality, Corporation or Cantonment or
Notified Town Area
(b)All other places which satisfied the following criteria:
(i)a minimum population of 5,000.
(ii)at least 75% of the male working population was non -
agricultural sector .
(iii) a density of population of at least 400 sq. Km. (i.e. 1000
per sq. Mile)
Anurban area can be defined by one or more of the following:
administrative criteria or political boundaries (e.g., area within
the jurisdiction of a municipality or town committee), a threshold
population size (where the minimum for an urban settlement is
typically i n the region of 2,000 people.
Urban growth is the (relative or absolute) increase in
thenumber of people who live in towns and cities.
Urbanization is the proportion of a country that is urban
Urban agglomeration is the proportion of a built -up or densely
populated area
Urban Sprawl is the uncontrolled and disproportionate
expansion of an urban area into the surrounding countryside,
forming low -density, poorly planned patterns of development.
Megacity is an urban agglomeration with a population of 10
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b. Trends of Indian Urbanisation
According to the Ministry of Urban Development, the
following trends are evident in Urbanisation in India.
Among all the States and Union territories, the National Capital
Territory of Delhi and the Union ter ritory of Chandigarh are most
urbanized with 97.5 percent and 97.25 percent urban population
Goa is now the most urbanized State with 62.2 percent urban
population, a significant increase since 2001 when urban
population of Goa was 49.8%.
Kerala, has an urban population of 47.7 per cent, while a
decade ago it was just 25.9 percent.
The North -Eastern States has Mizoram as the most urbanised
with 51.5 per cent urban population, though in terms of absolute
contribution to total urban populati on in the country, Mizoram’s
contribution is just 0.1 percent.
The proportion of urban population continues to be the lowest in
Himachal Pradesh with 10.0 per cent followed by Bihar with
11.3 percent, Assam (14.1 percent) and Orissa (16.7 percent).
Maharashtra has in absolute numbers the highest with 50.8
million persons which comprises 13.5 percent of the total urban
population of the country.
The provisional results of census 2011 reveals that there is an
increase of 2774 towns comprising 242 Stat utory and 2532
census towns over the decade.
Growth rate of population in urban areas was 31.8%.Further the
number of million plus cities/urban agglomeration UA has
increased from 35 in Census 2001 to 53 in Census 2011.
c.Causes ofUrbanisation:
Vario us reasons have led to the growth of cities. They are as
follows:
i.Industrialization:
Industrialization is a major cause of urbanization. It has
resulted in the employment for many people and areas have
become urban as they support secondary activities.
ii.Social factors andurban benefits:
In most developing countries people are attracted to urban
areas, better standard of living, better educational facilities, need
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Employment opportunities:
In India, cities provide more job opportunities to people.
Hence most cities tend to be overcrowded and centers of urban
growth.
iv.Modernization:
Urban areas are characterized by sophisticated technology
better infrastructure, communication, medical fac ilities, etc. People
feel that they can lead a comfortable life in cities and migrate to
cities.
v.Migration:
Migration of people from rural to urban areas, from the
suburbs to the city centre and from smaller towns to bigger cities.
vi. Natural Increa se of Population:
As the population of the cities grow there is an increase in
the number of urban population of the city.
4.5. PROBLEMS OF MIGRATION AND URBAN
GROWTH
i) What is migration?
Migration is the movement of people from one place to
another. The reasons for migration can be economic, social,
political or environmental. There are usually push factors andpull
factors at work for the process to be complete. Migration impacts
on both the place or origin , and on the place where migrants settle.
Historically man has been migrating for better opportunities,
agricultural lands, employment, avoid disasters, politically
motivated as refugees, religious reasons, and educational, social
and cu ltural reasons.
Push Factors Pull Factors
Hostile environment Improved employment opportunity
Disasters Religious Reasons
Political Refugee Social Reasons( Marriage)
Lack of opportunities
Education, EmploymentEducation
ii) People migrating may be of different types: -
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Internal Migration -is when the migration of the people is within
the country of origin. Internal migration could be rural to rural,
urban to urban, rural to urban, and urban to rural. Amongst the
different types, rural to urban migration is the most common in
India.
International Migration -Is when migration of the people is
from one country to another. It may be for employment, better
quality of life, marriage, education etc.
On the basis of numbers: -
Individual Migration -Is when an individual migrates to a new
land for his personal goals , needs and desires.
Group Migration -Is when people migrate in groups from one
place to another. Families, communities, groups of unrelated
people may migrate for the want of better opportunitiy. In India,
the highest numbers over (10 million) migrated du ring the
partition of the country in 1947, from West and East Pakistan
into India and vice versa. These were mostly community and
family migrations.
On the basis of Choice: -
Voluntary –When the migration of a person or a group of
people is by choice ,itis voluntary and based on the needs of
the of the individual or the group.
Forced -When migration is compulsory in order to survive or
when wars or political tensions force people out of their places
of living, they are forced migration also called the r efugees.
During the Kashmir insurgency the Kashmiri Pandits fled the
valley to avoid being troubled. Similarly, developmental projects
may create forced migration for the tribal people living in an
area. Building of dams, roads, rail lines, airports, force people to
leave a place and migrate.
Interestingly, when people migrate the following happens in
both the area where the migrant ismoved from and whe rehe is
headed.
Effect of Migration in
Area of OriginEffect of Migration in
Area of Destination
Will have lesser people Will have more people
Will have lesser workforce Will have more workforce
Will have less consumption of
goods and servicesWill have more consumption of
goods and services
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Quality of life improves Quality of life declines
Sparse population means better
available resourcesDense population means strain
on the existing resources.
iii) Effect of Urbanisation
Urban growth is the unprecedented growth of people,
houses and livelihood of an area. There are distinct reasons for the
growth of urban centers also called growth poles in a region. A
factory, a temple etc. may be triggers to allow growth of settlements
around them.
Positive effect of
UrbansiationNegative Effect of
Urbanistion
Migration of rural people to
urban areas.
Employment opportunities in
urban centres.
Transport and communication
facilities.
Educational facilities.
Increase in the standard of
living.Problem of over population
Cost of living
Increase in Crime rates
Pollution
Urbanisation comes with some defined problems: -
c. Degradation of air and water
d. Loss of soil cover impact on biodiversity,
a. Changing Land Use -Any urban area needs to develop on some
geographic space. This means that the city or a town needs some
space to grow or develop its houses, institutions, roads, railways
etc. Thus the land use in an urban area changes from largely rural
and agrarian to urban to include the urban facilities. The
morphology undergoes a change and may even impact the
ecological balance of a place. For example the increase in the built
up area may conflict and reduce the ground waste infiltration and
prevent natural water co nservation. Trees decline too and may
cause the air to be polluted and carbon balance may be impacted.
b.Crowding and Stress on Urban Resources or
Overpopulation -
Congestion and unhygienic living is dominant due to over
urbanization. The density of peopl e is very high in the urban areas
causing land prices to rise. Housing becomes expensive and
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and cluster settlements and vertical living e.g. high rises become a
norm. Mumbai as a city is known for its slum and one third of its
population live in them. Slums have been called by different locally,
aBasteein India, a Favela in Brazil etc.
c.Degradation of Air ,Water and Land or Pollution -
i) Pollution from contaminated waste from sewage, waste water,
industrial waste water and domestic wastewater may be a major
problem with urban development. Most Indian cities like Delhi
(Yamuna), Mumbai (Mithi )have seen water bound pollution from
urban rivers which have been converte d into carriers of urban
waste waters.
ii) Vehicular exhausts, industries emitting harmful gases,
dumpyards releasing gases, domestic heating may all be
contribution to the poor urban health of the air around it.
iii) Wasteland from dumping of the garbag e, creating dumpyards,
disposing harmful waste on urban lands can cause the land to be
degraded .
iv) Noise Pollution from vehicles, industries, crackers, honking, and
festival noise can all harm the urban environment.
d. Loss of soil cover and Impact on biodiversity -
The spread of urban population in an area needs built up
area. Vegetation is cut causing the biodiversity to be affected. In
Mumbai, the Sanjay Gandhi National Park has receeded to
accommodate the megacity. Similarly, man animal conflicts ca n
also occur, like sighting of the animal in urban areas, animals
venturing into roads, railways, bird hits in airports etc. The rise in
the number of people result in deforestation of the region and
hence the ecology is impacted.
Other problems include
Water Supply and Sanitation -The presence of a higher
population causes pressure on the existing water supplies and
ability of the municipality to handle the disposal of sanitation. Since
the pressure on water and other resources is very high shortages
may arise. Untreated waters may contaminate and make water
difficult to use.
Transportation -too many vehicles clog the transport networks and
cause traffic jams, overcrowding of the mass transport systems like
buses and trains. Delays in commuting, accident s, honking may
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Clearly the solution to the problems of urbanization is better
management from the problems and tackling the problems with
planning and vision.
(a) To create Employment at Rural Level: The chief responsible
factor for urbanization is limited employment in villages. So, we
should try to create more and more employment in rural area to
stop migration.
(b) The make the rural area better adapted to t ackle the disasters
like droughts which trigger massive migration to the cities.
c) Create sustainable cities which can plan the urban areas in
advance with the capacity of people it can hold. This will enable the
city planning to be scientific and create urban space for all the
residents of the cities.
Urban Sprawl -Excessive urbanisation in developing countries can
cause a different type of land use. Sprawl generally infers to some
type of development with impacts such as loss of agricultural land,
open space, and ecologically sensitive habitats. Also, sometimes
sprawl is equated with growth of town or city (radial spread). In
simpler words, as populat ion increases in an area or a city, the
boundary of the city expands to accommodate the growth; this
expansion is considered as sprawl. Usually sprawls take place on
the urban fringe, at the edge of an urban area or along the
highways.
4.6 URBAN HEAT IS LAND
In some instances, urban development may cause harm to
the environment. Due to pollution, the pollutant released may
modify the physical and chemical properties of the atmosphere, and
the covering of the soil surface. Generally a combined effect of a ll
these impacts causes what is known as Urban Heat Island. It is
defined as the rise in temperature of any man -made area, resulting
in a well -defined, distinct "warm island" among the cooler
surrounding region. The warm conditions are a result of the urba n
modifications that may have been made on the city, town or a built
up area.
The causes of U rban Heat Island (U HI)are:-
i) Removal of land cover and rep laced by built up area resulting in
reflection of heat into the atmosphere rather than absorbing the
heat.
ii) Urban construction materials have different thermal (heat
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emissivity) properties compared to surrounding rural areas, which
results in more of the sun’s energy being absorbed and stored in
urban compared to rural surfaces.
iii)Scattered and emitted radiation from atmospheric pollutants to
the urban area
iv)The production of waste heat from air conditioning and
refrigeration systems, as well from industrial processes and
vehicular traffic
Cities with variable landscapes and climates can have
temperatures several degr ees higher than their rural
surroundings
This increase may further create a warming due to increased
energy consumption for cooling (i.e. refrigeration and air -
conditioning),increase the energy production by power plants,
which leads to higher emissions o f heat -trapping greenhouse
gases such as carbon dioxide, as well as other pollutants such
as sulfur dioxide, carbon monoxide and particulate matter. Thus
a continous heat creation causes the temperature of the city to
remain higher than the adjoining regio ns
Health impacts -Heatstroke, heat exhaustion, pollution related
ailments, particularly in elderly and children may be seen
Meteorological impacts of the UHI are associated with
reductions in snowfall frequencies and intensities, as well as
reductions in the diurnal and seasonal range of freezing
temperatures.
High temperatures may alter the floral and fauna patterns and
living.
4.7 SMART CITIES
As an initiative of the Government of India, the Smart cities
concept has been introduced. The Ministry of Urban Development
has outlined the details entailed in the program which may see
some 20 Indian cities become smart in the future.
i) What is a Smar t City?
These cities are required to promote comprehensive
development -institutional, physical, social and economic
infrastructure. As a long term goal and cities can work towards
developing such comprehensive infrastructure gradually converting
into smart cities.
ii) Smart Cities Mission, ( objective) are:
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Give a decent quality of life to its citizens
A clean and sustainable environment
And application of ‘Smart’ Solutions.
The Smart Cities Mission of the Government is a bold, new
initiative, attempting to focus on the core infrastructure, such as,
i. Adequate water supply
ii.Assured electricity supply
iii. Sanitation, including solid waste management
iv.Efficient urban mobility and public transport
v.Affordable housing, especially for the poor
vi. Robust IT connectivity and digitalization
vii. Good governance, especially e -Governance and citizen
participation
viii.Sustainable environment
ix.Safety and security of citizens, particularly women, children
and the elderly
x.Health and education.
iii)Achievement of Smart City
a.To drive economic growth
b.Improve the quality of life of people by enabling local area
development
c.Harnessing technology, especially technology that leads to
Smart outcomes.
d.Area based development that will transform existing areas
(retrofit and redevelop), including slums, into better planned
ones, thereby improving livability of the whole City
iv) Smart City Features (Ministry of Urban Development) -
1.Promoting mixed land use in area based developments –
planning for ‘unplanned areas’ containing a range of compatible
activities and land uses..
2.Housing and inclusiveness -expand housing opportunities for
all;
3.Creating livable localities –reduce congestion, air pollution and
resource depletion, boost local economy, promote interactions
and ensure security.
4.Preserving and developing open spaces -parks, playgrounds
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5.Promoting a variety of transport options -Transit Oriented
Development (TOD), public transport
6.Making governance citizen -friendly and cost effective e.g.online
services to bring about accountability and transpare ncy
7.Giving an identity to the city -based on its main economic
activity, such as local cuisine, health, education, arts and craft,
culture, sports goods, furniture, hosiery, textile, dairy, etc;
8.Applying Smart Solutions to infrastructure and services in a rea-
based development in order to make them better. For example,
making areas less vulnerable to disasters, using fewer
resources, and providing cheaper services.
v) What is Area Based Development Models in Smart Cities
The strategic components of area -based development in the
Smart Cities Mission are : -
City improvement (retrofitting)
City renewal (redevelopment)
City extension (greenfield development) plus a
Pan-city initiative in which Smart Solutions are applied
covering larger parts of the city.
 Retrofitting will introduce planning in an existing built -up
area to achieve smart city objectives, to make an existing area
more efficient and liveable. Since existing structures are largely to
remain intact in this model, it is expected that more intensi ve
infrastructure service levels and a large number of smart
applications will be packed into the retrofitted smart city. This
strategy may also be completed in a shorter time frame, leading to
its replication in another part of the city.
 Redevelopment will effect a replacement of the existing
built-up environment and enable co -creation of a new layout with
enhanced infrastructure using mixed land use and increased
density. Example, Saifee Burhani Upliftment Project in Mumbai
(also called the Bhendi Bazaar Project) and the redevelopment of
East Kidwai Nagar in New Delhi being undertaken by the National
Building Construction Corporation.
 Greenfield development will introduce most of the Smart
Solutions in a previously vacant area using innovative planning,
plan financing and plan implementation tools (e.g. land pooling/
land reconstitution) with provision for affordable housing, especially
for the poor. Greenfield developments are required around cities in
order to address the needs of the expanding populati on. One well
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 Pan-city development envisages application of selected
Smart Solutions to the existing city -wide infrastructure. Application
of Smart Solutions will involve the use of technology, information
and dat a to make infrastructure and services better. For example,
applying Smart Solutions in the transport sector.
Bhubaneshwar tops the list as the first city to be selected for
smart city program. Twenty cities which include Mumbai, Pune,
Bhopal, Jaipur, Ludh iana, Ahmadabad to name a few were
selected to start the smart city concept.
vi) Challenges of Smart City Program
India is a developing country and hence the biggest
challenge that India faces will be in the amount to be spent on the
creation of smart ci ty infrastructure. The model on retrofitting
includes working on existing urban spaces which make it difficult
and time consuming. All states in India may not adhere to the
manner of changing from the backwardness to transform into a
smart city. Finally, c hange of political will may cause projects to
remain suspended if not wrapped up in one governing session of
the political party.
4.8 SUMMARY
Development of urban areas is a necessity in the modern
world. Globally over half the population live in urban settlements.
The solution to any development is not to stop it but to manage it as
sustainably as possible. In 1991, the United Nations Centre for
Human Settlements in its sustainable Cities program, tried to
highlig ht the need to develop the urban space in a sustainable
manner by following the three pillars of sustainable development,
social development, economic development and environmental
sustainability, in its planning. Most of the developing nations are
struggl ing with huge volumes of urban population which need to be
managed. Hence, a sustainable city will have low ecological
footprint and would meet the development needs of the inhabitants
without damaging the environment.
4.9. CHECK YOUR PROGRESS/EXERCISE
1. True or False
a. All regions move from urban to rural in the urban process
b. Megacity has 5000 people in it.
c. India has more urban than rural population
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e. Environmental sustainability is possible in proper
development of cities.
2. Fill in the Blanks
a. The definition of urban centers India follows if from ______
census
b. Slums are called ___________ in Brazil
c. ____________ will introduce most of the Smart Solutions in
a previously vacant area
d. ___________ is a push factor of migration
e. _________ is the first city to be chosen for smart city in
India.
3. Multiple Choice Questions
a.________ will introduce planning in an existing built -up area to
achieve smart city objectives
i. Rebuilding
ii. Retrofitting
iii. Pan Development
iv. Retoning
b. This State/Union Territory has the highest urban population
_________
i) NCT Delhi
ii. MP
iii. Assam
iv. Goa
c. _____________ is a positive effect of urbanisation
i. Employment
ii. Transport
iii. Degradation
iv. Pollution
d. ___________ state has the highest absolute numbers of urban
population
i. West Bengal
ii. Punjab
iii. Maharashtra
iv. Tamil Nadu
e. ________ causes forced migration
i. Employment
ii. Education
iii. Wars
iv. social visitmunotes.in

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Answers to the self -learning questions
1. True or False
1.a. False
1.b. False
1.c. False
1.d. False
1.e. True
2. Fill in the Blanks
2.a. 1961
2.b. Favela
2.c.Greenfield development
2.d. Disaster
2e. Bhubhaneshwar
3. Multiple Choice Questions
3.a. (ii)
3.b. (i)
3.c. (i)
3.d. (iii)
3.e. (iii)
4.10 TECHNICAL WORDS AND THEIR MEANINGS
Urbanisation :The process of becoming urban from a rural
region.
Smart City: New manner of planned development for existing
and newer urban spaces.
Urban Sprawl: Cluster development of urban area for multiple
geographical reasons.
4.11 TASK
 Make a study among your classmates to ascertain the
distance travelled by them to reach your college. Map and show the
hinterland of your institute
4.12 REFEREN CES FOR FURTHER STUDY
Basics in Environmental Studies, Dr .Pushpendra
Environmental Management, Swapan Deb.
Ministry of Urban Development official Website for Smart Cities
The Sage Handbook of Environment and Society, Ward, Hugh
eds.
Environment and Sustainable Development, Sundar, I.
Human Geography, Majid Hussain
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Unit -5
READING OF THEMATIC MAPS
CARTOGRAPHIC TECHNIQUES
NEED OF CARTOGRAPHIC TECHNIQUES :
Introduction -
We deal with the different types of quantitative data every day e.g.
Time, Distance, Weight, Temperature, Rainfall, Price, Discount,
Attendance %, Marks in the examination etc.
Similarly lot of statistical or Quantitative data is used for various
purposes like administration, planning etc.
Many of us have fear about mathematics and hence they are
reluctant to pay attention to the numbers.
Cartogra phic Techniques help us to present numerical information /
Quantitative information in the attractive form -i.e. in the form of a
diagram. We hate to take medicine in the form of bitter powder but
we take the same bitter medicine (powder) easily in the fo rm of a
capsule -because capsule looks very attractive.
CARTOGRAPHIC TECHNIQUES
Located Bars Isopleth map
located Circles Choropleth Map
Pie chart Dot Map
Flow Map Pictogram
ADVANTAGES
The advantages of the cartographic techniques are as follows :
Graphical Form -
Cartographic techniques like bars, circles, pie charts have specific
attractive graphical forms :
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Diagrams are proportional to the Quantity which they
represent :
We do not write numbers proportional to the quantity which
they represe nt. e.g. Number 1 (one) and number 9 (nine). In this
case we dot not write number Nine -9 times larger than number one.
Hence the difference between 1 and 9 may not be very distinct. But
if we represent these numbers with the help of bars, then we find
thatbar for number 9 is nine times bigger than the bar of number 1.
Hence even a illiterate person can easily understand
difference between number one and number nine with the help of
cartographic technique (bar).
Attractive colours and shades can be use d for the cartographic
techniques -
We are fond of colours. We prefer colour T.V. than the black
and white T.V. Girls apply bright colured lipsticks to look very
attractive. Similarly colourful cartographic techniques attract our
attention and serve our pu rpose of conveying statistical information
easily to the reader.
Isolated from text -
Diagrams and maps are generally isolated from the text.
These are drawn within a frame -mostly rectangular. Hence they
are not mixed with the text matter. Statistical d ata or numbers
written along with the text are not highlighted or attract our
attention. On the other hand diagrams or maps drawn within frame
attract our attention. Even the blank space within the framework of
diagram or map help us to focus our attention on the map or the
cartographic techniques e.g. Leader who is giving his speech from
the stage attracts more attention than the leader standing in the
crowd.
Pictoral form -
The process of learning starts with the help of pictures e.g.
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compartment or toilet becomes more effective than the written
words. There are many languages in this world and hence if you
know particular language only then you can read that word and
understand its mean ing, but language of picture is understood by
anyone in this world. Illiterate or literate, young or old.
‘I Love You’
You can understand this message only if you know English
In pictogram -one of the cartographic technique -we use
appropriate picture s to represent our data e.g. picture of tree to
represent forest, Atomic reactor for atomic power stations, or
human being for population.
Logical Reasoning -
In the different cartographic techniques some kind of logical
reasoning is used in each techniqu e. e.g. Bar is a linear diagram,
where length of bar is proportional to the quantity it represents.
In circle diagram area of the circle is drawn proportional to the
quantity it represents.
CARTOGRAHIC TECHNIQUES
Located Bars :
Bar is a linear diagra m, which means the length of bar is drawn
proportional to its length.
When bar is placed on the map at proper location it is termed as
located bar. It is necessary to compare bar with the key provided in
the map to know its actual or approximate value. i .e. if length of the
bar drawn on the map is same as the bar represented in the key
then we get exact value of the bar, but the length of bar is between
two values of the bars represented in the key, then we get
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Bar can be drawn in v ertical or horizontal direction but width of all
bars should remain same.
Bars are drawn to represent population, industrial production, crop
production, mineral production, rainfall etc.
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Located Circles :
Circle is a areal diagram, which means area of the circle is
drawn proportional to the quantity it represents. Hence circles are
used for the data which has greater range -(i.e. difference between
the lower and higher value.) When circle is drawn on the map at
proper location it is termed as located circle. We can compare size
of the circle drawn on the map with the circle drawn in the key by
comparing their diameters.
Circles are drawn to represent population, crop production or
the production of various commodities.
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Divided Circles :
Divided cir cles help us to represent sub -divisions in the
quantity represented e.g. Different sources of power are generated
at a particular place. e.g. hydel, thermal and atomic. This variation
can be represented with the help of divided circles. In this case size
of the circle will represent total amount of power generated at a
particular place and each sector of the circle will be drawn
proportional to the production of particular type of power i.e. hydel
or thermal etc. It is assumed that the total amount of power
generated is equal to the total degrees of the circle i.e. 360 and so
each segment or sector representing subdivision will be drawn
proportionately.
Divided circles or Pie diagram : Example 2
Subdivisions in the data can be represented effectively with
the help of divided circles or pie diagram. Circle can be divided into
3600 and hence the total quantity is assumed to be 3600 and the
subdivisions are represented as segments of the circle for which
the angle of the segment is proportional to the quantity of the
subdivision.
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Isopleth and Choropleth -
In both these cartographic techniques line shades are used
to represent data. Darker shade represents higher density & lighter
shade represents lower density.
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Choropleth Map :
‘Choro’ means Region a nd ‘Pleth’ means density. Hence
choropleth map is a map which represents density distribution
within the various regions or administrative units.
Government collects statistical data from the people every
10 years through ‘Census’ operations. Hence lot of information /
data is available -village wise, talukawise, districtwise, statewise,
and countriwise. This information can be effectively represented by
choropleth map.
In order to bring out variation within data, it is divided into 4 -5
classes. Line sha des are used to represent these classes. Darker
shade is used for high density and lighter shade is used for low
density.
Key
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Isopleth Map :
Iso means equal and pleth means density. Hence Isopleth
map represents data with the help of Iso lines i.e. the lines of equal
value. In order to bring out variation in the data, area between
isolines is covered by line shades. Darker shade is used to
represent higher density and lighter shade is used to represent
lower density. Similar to the shades used in the choropleth map.
Data of natural elements like temperature, rainfall,
atmospheric pressure etc. has no relation with the administrative
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features like temperature, rainfall, atmosphere pressure etc. is
represented with the help of isolines.
Temperature values at different locations.
Isolines of 20 c and 30c
Selection of shades Darker shade for areas having higher
temperature ( 30 c )
Temperature
Lighter shade for the areas having lower temperature (< 200c)
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DOT MAP
A Map in which ‘dots’ are used to represent distribution is
known as Dot Map. It is one of the density maps. It is easy to draw
and simple to understand.
Dot p lays key role in the Dot Map and hence it is necessary
to remember.
Size of dot -It should not be too large or it should not be too small.
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Value of dot -Each dot has spe cific value in the Dot Map and
hence value of dot is carefully decided on the basis of size of the
map and size of the dot.
Placement of the dots -Earth’s surface is not even. Some areas
are suitable for man while other areas are not. Relief & other
factors are considered for the proper placement of the dots.
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Flow map -
Arrow indicates direction of movement. Hence flow line
indicates movement of population or material from one place to
another.
Width of the line or thickness of the flow line represen ts
quantity carried from one place to another.
Areas of production and the areas of consumption are not
same every where. Hence material is transported from one place to
another. This interaction between two places can be represented
by the flow map more effectively. In this map flow line is drawn
between two places and width of the line is drawn proportional to
the quantity of the material transferred from one place to another.
Flow map is also used to represent migration of people from one
place to anoth er.
In the above diagram place is connected to the places CandDThe
amount of material transported from to other places is as follows.
From To Material transported (in Thousand tones)
A B 20
A C 10
A D 50
In order to represent this data we will h ave to select suitable
scale i.e.
5 m.m. for 50 thousand tonnes.
2 m.m. for 20 thousand tonnes.
1 m.m. for 10 thousand tonnes.
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Pictogram -
The ultimate goal of any map is to convey information
effectively and attractively to the reader.
Pictures are very effective in communicating information. All
people young or old like pictures and hence information or data is
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There are two methods of drawing pictograms :
a)Size of the symbols remains same in this method small size
symbols / pictures are used. Each symbol / picture has specific
value e.g. one picture of man represents 10,000 persons and so in
order to represents population of 50,000 persons we will have to
draw 5 pictures.
b)Variable size of the pictures -In this method size of the picture -
i.e. height of the picture -is drawn proportionately to the quantity
which it represents.
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Tips forsolving questions related totheCartographic Techniques.
LOCATED BARS
How to solve questions related to the located bars?
Take a piece of paper or you can use edge of your question paper.
Keep this paper near to the bar and mark height of the bar on the
paper with the help of pencil marks. (Fig. 1)
Pencil
marks
Key
Production in
thousand tonnes
-100
-80
-50
Paper Strip
Figure 1
Now shift paper near to the key of the map. If height of the bar
perfectly matches with the height of the bar in the key then you can
mention exact value of the bar. (Fig.2)
Pencil marks on the strip match with the bar in the key and h ence
we can mention exact value as production 100 thousand tonnes.
Key
Production in
thousand tonnes
-100
-80
-50
Paper Strip
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Key production in
Thousand tonnes
-100
-80
-50
Pencil marks on the strip do not match with the bar in the key
and hence we can not mention exact value so our answer is
production is between 80 to 100 thousand tonnes.
Figure 3
But if it is in between two bars in the key, th en mention lower
and upper values represented in the key. (Fig. 3)
Same technique can be used for the located circles map and
flow diagram.
In the case of located circles mark the diameter of the circle
on the strip of paper with the help of pencil marks and compare it
with the key given in the map.
Pencil marks
Key
Population
In million
50
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Key
Population in Million
50
25
Penc il marks
In this case diameter of the circle is between ‘25’ and ‘50’ so
our answer is Population of the city is between 25 to 50 million.
Figure 5
In the case of flow map mark width of the flow on the strip of paper
and compare it with key, given in the map.
ADDITIONAL EXERCISES -CARTOGRAPHIC TECHNIQUES
1)Study the world map given below and answer the following
questions.
What is the theme of the map?
Which cartographic technique is used to represent the theme?
Which country in the South Hemi sphere show highest range of
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Identity country in the northern hemisphere, having GNP ranging
between 20% and 62%.
2)Study the world map given below and answer the following
questions. (5)
What is the theme of the map?
Which cartographic technique is used to represent the theme?
What is the total quantity of iron produced in USA?
What is the total quantity of iron produced by Europe as per this
map?
What is the total production of iron by Indi a?
3)Study the world map given below and answer the following
questions. (5)
What is the theme of the map?
Name the cartographic technique used in this map.
State the amount of foreign debt of Mexico, India and Hongkong.
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4)Study the world map printe d below and answer the following
questions. (5)
What is the theme of the map?
Name the cartographic technique used to represent the theme.
Name the countries having the least and maximum gross national
income per capita 2007.
With the help of the scale find out gross national income per capita
of South American countries?
5)Study the world map printed below and answer the following
questions. (5)
What is the theme of the map?
Which cartographic technique is used to represent the theme?
With the help of the scale, find out the percentage of population
between the age group of 15 -64 years in Argentina.
With the help of the scale find out the percentage of senior citizens
in North -American countries.
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SECTION -II WORLD MAP
Colour maps given in this Section as per the instructions
SECTION -II WORLD MAP
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Selected Countries in the World -
Canada
U.S.A.
Mexico
Brazil
Argentina
Chile
U.K.
France
Spain
Portugal
Germany
Poland
Switzerland
Italy
Norway
Sweden
Finland
Russia
China
Japan
India
Sri Lanka
Nepal
Bangladesh
Pakistan
Malaysia
Singapore
Indonesia
Australia
Iran
Iraq
Saudi Arabia
Egypt
Nigeria
Sudan
Ethiopia
Kenya
Tanzania
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Exerci se
Environmentally Significant Features.
Mark and Name following features in the map of the world.
PHYSICAL FEATURES
1.Major ocean to the south of India. (Indian Ocean)
2.Continent in the southern hemisphere, which is covered by
snow (Antaractica)
3.Eathquake prone area inthenorthern partofIndia (Himalaya)
4.Largest continent in the world (Asia)
5.Desert in South America (Atacama)
6.Continent, which is near to the South Pole and is uninhabited
(Antarctica)
7.Major island near North America. (Greenland)
8.Drought aff ected country in Africa (Ethiopia)
9.Largest ocean in the world (Pacific)
10.Major flood affected country to the east of India (Bangladesh)
11.Largest desert in the world (Sahara)
12.Earthquake prone area near Pacific Ocean (Circum Pacific
Belt)
13.Smallest continent in the world. (Australia)
14.Major flood affected country to the west of India. (Pakistan)
15.Major mountain range in the South America (Andes)
16.Desert area in southern part of Africa (Kalhari)
17.Country having largest oil reserves Arabia)
18.(Saudi Major flood aff ected country tothenorth of Sri Lanka.
(India)
19.Earthquake prone area to the north of Mediterranean Sea
(Alps.)
20.Mountain range to the north of India (Himalaya)
21.Major mountain range in the Western part of N. America.
(Rocky mountains)
22.Major mountain range in the eastern part of N. America
(Appalachian)
23.The canal which separates two continents. (Suez Canal)
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HUMAN (CULTURAL) OR ANTHROPOGENIC FEATURES
1.New York to London air route.
2.Singapre to London air route.
3.Major canal which is situated between two major continents.
(Suez Canal)
4.Aninternational porttotheSouth ofIndia (Colombo)
5.An international post which is near to the Equator. (Singapore)
6.Area in North America affected by Acid Rain. (N.E. part of
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7.Major producer of nuclear power in Asia (Japan)
8.A canal, which connects two oceans (Panama Canal)
9.Longest railway route in the world. (Trans -siberian railway
from Leningrad to Vladivostok)
10.Buenos Aires to Cape Town air route
11.Area affected by Acid Rain to the east of China (Japan)
12.Country having largest population in the world.
13.Asian country affected by Acid Rain (Japan)
14.New York to Mumbai air route.
15.Region in Europe affected by Acid Rain (N.W. Europe)
16.City in India, which was af fected by worst gas disaster
(Bhopal)
17.Cape town to Colombo air route.
18.The longest ship canal (Suez 16.9 Km)
19.Delhi to Tokyo air route.
20.Mumbai to Moscow air route.
21.Delhi to Canbera air route.
22.Washington D.C. to Paris air route.
23.Delhi to London air route .
24.Cairo to Hongkong air route.
25.New York to Moscow air route.
26.San Francisco to New York ship route.
ADDITIONAL EXERCISES MAP OF THE WORLD
1)Mark and Name the following on the outline Map of the World :
(5)
An ‘earthquake’ prone island in Far -East Asia.
Part of India with economic water scarcity.
A country in Africa with very high Deforestation rate.
A sea experiencing oil spill.
An European country facing problem of ‘Acid rain’.
2)Mark and name the following features on the outline map of
world provid ed to you : (5)
A country with highest deforestation rate in South America.
An area rich in biodiversity in India.
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A Gulf in the West Asia having problems of oil spill.
An earthquake prone island cou ntry in far East Asia.
3)Mark and Name the following in the outline Map of the World:
(5)
Mumbai to London water way
Panama Canal
Industrial area in the USA
Worlds largest producer of rubber
Amazon basin
4)Mark and Name the following on the outline Map of the World:
(5)
Suez Canal
Equatorial forest in South America.
Mumbai to Moscow air route
Alps mountain
Leading fishing bank in North Sea
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Environmental Studies -Semester I
Duration: 03 Hours Marks: 100
Notice: 1) all questions are compulsory and carry equal marks
2) Use of map stencils and simple calculator is allowed.
3) Attach the given maps along with your answer book.
Q.1. (a) Read the world thematic nap and answer the question of
following (10)
i.What is the theme of the map?
ii.Describe the Cartographic technique used in the map
iii.Which country has the highest Gross National Income Per
Capita in 2015?
iv.Which country has the lowest Gross National Income Per Capita
in 2015?
v.What is the value of Gross National Income Per Capita for USA
and Canada?
Q1. B] On the given outline map of Mumbai mark and name the
following (10)
i. Atlantic Ocean
ii. Ganga River
iii. Thar Desert
iv. North America
v. Himalaya Mountain Range
vi. Coniferous Forest Region
vii. Mumbai
viii. Bhuj Earth quake Prone Area
ix. Tokyo Million City
x. Bay of Bengal
Q2. Attempt any two questions from the following:
A]Define Environment and describe the different components of an
Environment .
B]What is an Ecosystem? Explain different types of Ecosystems
with suitable examples.
C]Describe Food Chain, Food Web and Ecological Pyramid with
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Q3. Attempt any two questions from the following:
A]What do you mean by Renewa ble Energy Sources? Explain
types of Renewable Energy Sources.
B]Explain the different methods of Natural Resource
Conservation.
C]What is water pollution? Explain its causes and effects.
Q4. Attempt any two questions from the following:
A]What are the causes and effects of Population Growth in India.
B]Divide the world into major population density zones.
C]What is Demographic Transition Theory and Explain its stages.
Q5. Attempt any two questions from the following:
A]What is Migration? Explain different types of migration.
B]What is a Smart City? Explain in detail.
C]What are the causes of Urbanization? Mention the positive and
negative effects of Urbanization.
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