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Explain how does green house effect cause global warming. |
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Answer» Solution :(i) The earth.s atmosphere allows most of the visible light from the sun to pass through and reach the earth.s surface. As earth.s surface is heated by SUNLIGHT, it radiates a part of this energy back towards the space as longer IR wavelengths. (ii) Some of the heat is trapped by `CH_(4)CO_(2)CFCS` and water vapour present in the atmosphere.They absorb IR radiations and block a large portion of earth.s emitted radiations. (iii) The radiations thus absorbed is partly REMITTED to the earth.s surface. Therefore the earth surface gets heated up by a phenomenon called greenhouse effect. (IV) Thus greenhouse effect is defined as the heating up of the earth surface due to trapping infrared radiations reflected by earth.s surface by `CO_(2)` layer in the atmosphere. The calme up of the earth through the greenhouse effect is called global warming. |
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