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What is Green house effect ? How does it affect the global climate ? |
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Answer» Solution :Atmosphere around the earth acts like a glass of the green house CHAMBER. The gases PRESENT in the atmosphere which cause green house effect are referred to as green house gases. The various green house gases are : `CO_(2), H_(2)O` vapour, chlorofluoro carbons and oxides of nitrogen. The green house gases in the atmosphere form a thick cover around the earth. The earth receives a large amount of energy from the sun. The IR radiations coming from sun are not ABSORBED by atmospheric gases. The earth absorbs these IR radiations of short WAVELENGTH. As a results of this the temperature of earth stands rising. Eventually , earth starts emitting INFRARED radiations of longer wavelengths. Th partially radiated infra red radiations from the earth are absorbed by `CO_(2)`. This results in excessive heating of earths atmosphere. |
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