A) \[CFCs\,14%,\,\,C{{H}_{4}}20%\]
B) \[C{{O}_{2}}40%,CFCs30%\]
C) \[{{N}_{2}}O6%,C{{O}_{2}}86%\]
D) \[C{{H}_{4}}20%,{{N}_{2}}O18%\]
Correct Answer: A
Solution :
The gases, which are transparent to solar radiation but retain and partially reflect back long wave heat radiations are called green-house gases. Recently, the concentration of green-house gases has started rising resulting in enhanced green-house effect that is resulting in increase the mean global temperature. It is called global warming. The various green house gases are \[C{{O}_{2}}\] (warming effect 60%), \[C{{H}_{4}}\] (20%), CFCs (14%) and nitrous oxide-\[{{N}_{2}}O\] (6%).
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