class 12

1. Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

2. Introduction
• The economic development that we have
achieved so far has come at a very heavy
price-at the cost of environment quality.
• We have to bear in mind the adverse
consequences of the past development path
on our environment and consciously choose a
path of sustainable development.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

3. Environment
• According to Environment Protection Act,
1886 “ Environment includes water, air and
land and the relationship which exists among
and between water, air, land and human being
and other creatures, plants, micro organisms
and property.”
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

4. Function of Environment
• Environment supplies resources
• Environment assimilates (absorbs) waste
• Environment sustains life(by providing genetic
and bio-diversity)
• Environment provides aesthetic services.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

5. Environment crisis
• The environment is able to perform its
functions without any interruption as long as
the demand on these functions is within its
carrying capacity.
• Carrying capacity means
• Extraction of resources should be less than the
rate of regeneration of resources.
• Wastes generated are within the assimilating
capacity of the environment.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

6. Environment fails when
• The raising population of the developing
countries and the affluent consumption and
production standards of the developed world
have placed a huge stress on the environment.
• Many resources have become extinct and the
wastes generated are beyond the absorptive
capacity of the environment
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

7. Jai guru dev
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

8. Reasons for environment crisis
• Global warming
• Ozone depletion
• Overuse and misuse of environmental
resources.
• Opportunity cost of negative environmental
impacts
• Supply demand reversal of environmental
resources.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

9. Jai guru dev
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

10. State of India’s Environment
• Natural resources of India
• The black soil of the Deccan Plateau is particularly suitable for
cultivation of cotton,
• The Indo-Gangetic plains – spread from Arabian Sea to the Bay of
Bengal – are one of the most fertile ,densely populated
• India forests provide natural cover for its wildlife
• Large deposits of iron-ore, coal and natural gas are found in the
country. India accounts for nearly 20% of the world’s total iron-ore
reserves
• Bauxite ,copper , chromate
,diamonds,gold,lead,lignire,maganese,zinc,uranium…..are also
available
• developmental activities resulted in pressure on its natural
resources and human health.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

11. Environmental degradation
• Pollution
• Degradation of natural resources
• Biodiversity loss
• Management of fresh water and solid waste
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

12. Jai guru dev
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

13. Pollution
Pollution
Air
water
Noise
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

14. Air pollution
• Vehicular emission are of particular concern
since these are ground level sources and this,
have the maximum impact on general
population. The number of motor vehicles has
increased from about 3 lakh in 1951 to nearly
67 crore in 2003. personal transport vehicles
constitute about 80% of the total number of
registered vehicles in 2003, contributing
significantly to total air pollution load.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

15. Water pollution
• Water pollution means presence of water
pollutants in the water which are harmful for
the quality of water and which affect
adversely the aquatic ecosystem
• The major sources of water pollution are
1. Domestic sewage
2. Agricultural waste materials
3. Industrial waste
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

16. Noise pollution
• Noise pollution means discomfort and irritation
caused by unwanted sounds
• The major sources of noise pollution are
a. Sound produced by heavy machines
b. Sound produced by automobiles
c. Sound produced by explosive, fireworks,
loudspeaker
d. Sound produced by street noises
e. Sound produced by wind ,oceans etc.,
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

17. Degradation of Natural Resources
• Deforestation
• Land degradation (decline in fertility of land)
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

18. Biodiversity loss
• The high density of population livestock and
the competing uses of land for agricultural
forestry, human settlements, industries etc.,
exert and enormous pressure on the country’s
finite resources, which put a strain on the eco-
system resulting in extinction of plants and
animal species. This loss is known as bio-
diversity
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

19. Bio diversity loss
After independence, economic reforms caused rapid industrialization,
growing townships and urbanization.
this has led to destruction of habitats and bio-diversity sites.
Per capita forests land in the country is only 0.08 hectare to meet basic
needs, resulting in an excess felling of about 15million cubic meter
forests over the permissible limit resulting in loss of habitats for
animals and wild life.
Estimate of soil erosion show that soil is being eroded at a rate of 5.3
billion tones a year for the entire country as a result of which a country
loses 0.8 million tones of nitrogen,1.8 million tones of phosphorus ad
26.3 million tones of potassium every year. According to government
of India the quantity of nutrients lost due to erosion each year ranges
from 5.8 to 8.4 million tones.
Some people did try to stop indiscriminate cutting of trees through
some movement like Chipko and Appiko .
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

20. Jai guru dev
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

21. Management of fresh water and solid
waste
• In India, availability of fresh and clean water is
very low. Nearly 70% of water in India is
polluted
• There is also lack of planning and
management of solid waste, garbage is not
property collected and in some places the
garbage is dumped in open areas or into
landfills which is not only visibly ugly but also
causes diseases like dengue, malaria etc.,
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

22. Causes or factors of environmental
degradation
• High growth rate of population
• Increasing urbanization
• Rapid industrialization
• Poverty
• Increase in pollution
• Increase in use of insecticides, pesticides and
fertilizers
• Massive overuse and misuse of environmental
resources.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

23. Measures to control environmental
degradation
• Population control
• Pollution control
• Eradication of poverty
• Creating awareness among masses
• Management of solid waste
• Developing urban areas
• Suitable pattern of economic growth
• Adopting sustainable development.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

24. Jai guru dev
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

25. Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

26. Sustainable Development
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

27. Sustainable development
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

28. The United Nations Conference on Environment
and Development defined as “ development
that meet the need of the present generation
without compromising the ability of the future
generation to meet their own needs “
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

29. Features of SD
• Sustained rise in per capita income (real) and
economic welfare
• Ability of future generations to meet their
needs
• Rational use of environmental resources
• Control on pollution
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

30. Steps and strategies for sustainable
development
• Limiting the human population to a level within the
carrying capacity of the environment.
• Technological progress should be input efficient and
not input consuming
• Renewable resources should be extracted on a
sustainable basis, that is, rate of extraction should not
exceed rate of regeneration.
• For non-renewable resources rate of depletion should
not exceed the rate of creation of renewable
substitutes
• Inefficiencies arising from pollution should be
corrected.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

31. Possible strategies to achieve SD in
India.
• Use of non-conventional sources of energy
• Encouraging use of cleaner fuels
• Solar power through photovoltaic cells
• Setting mini hydel plants
• Traditional knowledge and practices
• Bio composting
• Biopest control
• Organic farming
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

32. Other measures
• Recycling the waste into compost and manure
• Creating awareness among masses about
rational use of environmental resources
• Both producers and consumers should be
conscious to be environment friendly.
Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,

33. Madan Kumar
M.A.,M.A.,B.Ed.,M.Phil.,M.B.A.,