Q.

Which one of the following is not a 'green house gas'?

A. Chlorofluorocarbons
B. Methane
C. Carbon dioxide
D. Nitrogen
Answer» D. Nitrogen
Explanation: The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. The anthropogenic compound of Chlorofluorocarbons is also a greenhouse gas, with a much higher potential to enhance the greenhouse effect than CO2.
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