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Question

What is mean by green house effect?


Solution

Effect of greenhouse refers to the warming up of the earth .  The earth is almost transparent to the incoming solar radiation . When solar radiation reaches the earth , it warms up the earth's surface . After warming up , the earth emits this energy back to atmosphere in the form of infrared radiation . when this infrared radiation travels through the atmosphere , some part of it gets absorbed by gases like carbon-dioxide , methane , nitrous oxide and water vapours . Absorption of this infrared energy by the earth or atmosphere is called greenhouse effect .

                                               Amount of carbon-dioxide has increased by 28% in the last one hundred years which is attributed to burning of fossil fuels like coal , gas and oil . Efforts are being made at the world levelto reduce the gases that result in the greenhouse effect .

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