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There are different groups of scientists who show
different models of earth temperature and show different causes of this
dangerous phenomenon. One group says that it is a natural phenomenon and
there is no serious threat. They say that temperatures rose steeply in the
decades before 1940 and dropped from 1940 to about 1975. The
recent rise in temperature may be same as happened before 1940.
The second group says that global warming is a man induced phenomenon and
it is because of the increase of gases like Chloro Fluoro Carbons (CFC),
carbon dioxide (CO2), methane (CH4)
and Nitrous Oxide in the
atmosphere. They are of the view that global
warming is because of “The
Green House Effect” and it will create serious
problems for the human beings.
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