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Answer Posted / yash
Basically greenhouse effect has two contradictory
meaning.One is positive and a negetive. The positive meaning
(which is usefull) states that it is a phenomenon which
helps ,basically, to retain heat. this type of phenomenon
is used in areas where heat cannot be retained and
agriculture is not possible (in colder regions of the
world ), that is why greenhouses are build(with roof of
glass). These glass roof allows heat to enter greenhouse
(through sun rays) but being bad conductor of heat
restricts the escape of the retained heat, which allows
plants to grow inspite of cold atmosphere, snow and frezed
soil. On the other hand negetive aspects shows that
harmfull gases like CO2,CO , NO2 gets deposited into the
atmosphere . Earth gets constantly heated due to sun rays
falling on it. Ozone layer helps to eliminate the
excessively generated heat which in turn regulates the
earth's atmosphere. But these gases(also called greenhouse
gases) being traped , does not allow to escapes the heat
which in turn increses the earth's amosphere.
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