Explain the greenhouse effect and how it is related to global warming. (04marks)

Explain the greenhouse effect and how it is related to global warming. (04marks)

Short wavelength radiation from the sun passes through glass of green house. This is absorbed by plants and soil leading to increase in temperature. Plants and soil reradiate long wavelength radiations which cannot penetrate the glass and trapped in the greenhouse leading to higher temperature inside the greenhouse.

Water vapour, carbon dioxide, CFC and other greenhouse gases exhibit the same selective absorption effect in the temperature, making the earth to high temperature by absorbing short wavelength radiation.

The earth reradiates long wavelength radiation which is absorbed by the layers of greenhouse gases. This leads to increased temperature over the earth and after a long time may lead to global warming.

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