Page 5 - GREENHOUSE EFFECT AND GLOBAL WARMING

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1. 1. Carbon dioxide- It is mainly produced by respiration
in living organisms and burning of fuels. Over the
past few years, due to various human activities and
increase in population, the amount of carbon
dioxide present in air has increased a lot. This has
definitely disturbed the balance of oxygen and
carbon dioxide in the air.

2. 2. Methane- It is another greenhouse gas released
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from landfills and wetlands. Grass-eating animals,
while digesting their food, also release large
quantities of methane into the atmosphere.
Methane is also released when manure is produced

from animal waste.

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3. 3. Water vapour in the air comes from the evaporation

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of water from water bodies. It accounts for 35-37%
of the greenhouse effect.
4. 4. Ozone present in the stratosphere is also a
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greenhouse gas.