Answer:
Visible light from the sun
reaches die earth and heats it up. However, when the earth cools, the energy is
re-emitted from die earth's surface in the form of infrared radiation which
have longer wavelength and heating effect. These infrared radiation can be
absorbed by \[C{{O}_{2}}\] and \[{{H}_{2}}O\]vapours. The heat thus absorbed is
radiated back to the surface of the earth. In this way, warming of the earth occurs.
If the rate at which solar
energy is arriving the earth remains constant but the amount of\[C{{O}_{2}}\]in
the air increases, the heat radiated back to the earth will increase. Consequently,
the temperature of the earth's surface will increase. Hence, global warming
depends on the concentration of those gases which are responsible for greenhouse
effect.
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