Environmental Science

1. PRESENTED BY:RIDDHI N PATEL
[ 160630107092 ]

2. CONTENTS
 GREEN HOUSE
 GREEN HOUSE EFFECT
 GREEN HOUSE GASES
 GLOBAL WARMING DUE TO GREEN HOUSE
EFFECT
 INHANCED AND ENHANCED GREEN HOUSE
EFFECT
 EFFECT CAUSE GLOBAL WARMING
 INTERNATIONAL STEPS FOR MITIGATING
GLOBAL CHANGE

3. GREEN HOUSE
 A house of glass is used for raising delicate plants
and in cold countries . This house is called green
house .
 A green house has higher temperature inside than
outside which is due to :
1. Glass walls
2. High carbon dioxide content
3. High water vapour content of the air in green
house.

4. GREEN HOUSE EFFECT
 Green house let short wave radiation to pass
through them but prevent the escape of infrared
radiation emitted by the earth surface. This makes
inside house warmer than outside.
 This effect is known as
“GREEN HOUSE
EFFECT”

5. GREEN HOUSE GASES
 Some of the atmospheric gases and air pollutants
have the property similar to the glass.
 These gases are permeable to short wave
radiation ,but are strong absorber of infrared
radiation emitted from the heated earth surface are
referred to “GREEN HOUSE GASES”

6. MAJOR GREEN HOUSE GASES
 Following is the list of major Green house gases :
1 Carbon dioxide
2 Nitrous oxide
3 Methane
4 Chloro fluoro carbon

7. GLOBAL WARMING DUE TO
GREEN HOUSE EFFECT
 Warming of earth by green house effect is occurring
since many centuries, it is only due to this effect
that good temperature for living is maintained on
the earth surface but now due to large scale
pollution resulting from rapid industrialization fossil
fuel burning ,deforestation etc .this effect has
become more severe.

8. INHANCED AND ENHANCED
GREEN HOUSE EFFECT
 The natural green house effect is called inhanced
green house effect
 The green house effect due to the pollution is
enhanced green house effect.

9. GREEN HOUSE
EFFECT CAUSE
GLOBAL WARMING
 GLOBAL WARMING POTENTIAL:
It is the ratio of the warming caused by the
substance compared to the warming caused by the
similar mass of carbon dioxide .
The GWP is 1.0 for carbon dioxide.

10.  It contributes 55-60% to global warming from
green house gases produced by the human
activity.
 The main sources are:
1 Fossil fuel burning
2 Deforestation
3 Land clearing
4 Burning

11.  Chloro fluoro carbon are the synthetic gaseous
compounds of carbon and halogens
 It contributes 14-20% of human contribution to global
warming .
 There main sources are :
1 Air conditioners
2 refrigerator
3 Evaporation of industrial solvents
4 Propellants in aerosol spray cans

12.  It contributes 18-20% to global warming from
green house gases.
 Its sources are:
1 anaerobic decomposition of bacteria called
methanogens.
2 Garbage dumps
3 Flooded rice fields
4 Biomass burning

13.  It is responsible for 6% of human input of green
house gases.
 The main sources are :
1 Biomass burning
2 Livestock waste
3 Nylon production
4 Burning of nitrogen
rich fuels

14.  There is sudden rise in temperature
 Rise in sea level
 Effect on human health
 Effect on food production
 Effect on climatic conditions
 Diseases like malaria ,elephantiasis etc increases
 Flooding occurs

17. Some of the international steps for
mitigating global warming are:
1 montreal protocol
2 Kyoto protocol
3 Earth summit

18.  In 1987 ,27 industrialized countries signed an
international agreement to protect ozone layer
in stratosphere
 This agreement is Montreal protocol
 Main points :
1 To limit the use of ozone depleting substances
2 Use alternatives

19.  An international conference held in kyoto , japan
in december ,1997 has specified the
commitments of different countries yo mitigate
climate change
 The united nations conference on environment
and development ,the Earth summit ,held at Rio
de janeiro ,brazil in 1992, established priciples
to reduce emission of green house gases