1. Green House Effect
DEFINITION:
“ It’s a phenomenon which helps to keep the earth
warm enough for existence of life on it”
INRODUCTION:
First postulated by a Swedish chemist in 1896
In recent years it was found that Carbon dioxide
has increased by 25 %
2. Contnd………
Stratosphere: a thin layer of certain gases in the
lower atmosphere at an average height of 30 Km.
from the surface of earth
This layer acts like a glass of Green House
Venus has CO2 60,000 times in its atmosphere
than earth and has a corresponding average
temperature of 850 F
Mars has no CO2 and its average temperature is
24 F
3. Atmosphere: ( Layers )
GEOSPHERE / EARTH
TROPOSHERE………..First 08 miles
Concerned with weather formation, temperature
changes and air movements, Temp. falls with
ascent at a rate of 1 F for every 100 meters
TROPOPAUSE…………Next 10 miles
There is no fall of temperature with ascent
STRATOSPHERE………Next 40 miles
Its lower portion is Ozone layer
4. Contnd………
IONOSPHERE……….Next 220 Miles
Contains charged particles or Ions in it
Has two layers (upper & lower)
Lower layer reflects radio-waves back to
the earth & makes long range broadcastings
possible
5. Contnd…….
VACUUM…………Next all space
INTERPLANETARY SPACE……Starts
at 10,000 miles from earth
GREEN HOUSE LAYERS……..First 25
miles from Earth
BIOSHERE……Part of the earth, its
waters & atmosphere where organisms can
live
6. Analysis of Green House Gases
There are 40 gases which affect the Green House but
important gases include:
1. CO2 : It is produced by :
Volcanoes
Decaying Plants
Breathing
Burning of Organic matter
It is fixed by :
Photosynthesis by plants
Absorption by the Sea
7. Contnd…….
2. METHANE :
20 % more capacity to trap heat as compared to
CO2 , It is produced by
Decomposition of Organic matter
Termites
Swamps
Cattle Farms
Cattle gut
8. Contnd…….
3. NITROUS OXIDE :
Produced by :
Land clearance for Agriculture
Use of Fertilizers
Combustion of fossil fuel
9. Contnd…….
4. SO2 : It is mainly produces by Industries
5. CFC (Man made Gas):
Used in Aerosol spray
Refrigerators
Insulating Foams
6. CO:
7. Water Vapours:
10. Causes of Global Green
House Effect
1. INCRESED PRODUCTION OF CO2
DUE TO :
• Population Explosion
• Rapid Industrialization
• Increased Agricultural activities
• Burning of Fossil fuels
• Cutting of Forests
11. Causes Contnd…..
2. INCREASED PRODUCTION OF
METHANE DUE TO :
• Increased Agricultural activities
• Natural gas burning
• Decomposition of Organic matter
• Bacterial activities in the gut of cattle
• Termite
12. Causes Contnd…..
3. INCREASED PRODUCTION OF
NITROUSE OXIDE DUE TO :
• Land clearance
• Use of Fertilizers
• Fossil Fuel burning
4. DEFORESTATION :
13. Influences of Global Green
House Effect
1. Rise in temperature (3-9 F)
2. Rise in Oceans level (3-5 ft.)
3. Floods
4. Extremes of Wheather
5. Climatic changes in Tropics & Subtropics
14. Effects of Ozone Depletion
1. Sun Burns
2. Skin Cancer
3. Cataract
4. Weakening of Immune System
15. Acid Rain
Produced due to invisible clouds of Sulpher and
Nitrogen Oxides
SOURCES :
1. Burning of Fossil fuels
2. Coal burning
3. Smoking
4. Factories
5. Motor Vehicles exhaust
16. Acid Rain Contnd…..
CHEMICAL REACTION :
SO2 & NO2 are converted to H2SO4 & HNO3
EFFECTS OF ACID RAIN :
1. Killing of Marine life
2. Destruction of Nutrients in subsoil
3. Erosion of buildings & metals
4. Damage of Crops
5. Contamination of drinking water
17. Control Measures of Global
Green House Effect
Energy conservation
Rising the cost of fuels
Developing new energy systems
Forest protection / Reforestation
Recovery of Methane from garbage
Banning of CFC production
International Conferences
National Standards of Pollutants
Anti Pollution measures
18. Sustainable Development
DEFINITION :
It is the continuous development (in
environment) today that will not
compromise the well being of the future
generations
Development should continue to give food,
shelter & other provisions to every body but
not at the expense of Environment
19. Measures to attain
Sustainable Development
AT PERSONAL LEVEL
AT NATIONAL LEVEL
AT INTERNATIONAL LEVEL