Which one of the following is not a 'Green house gas'?
A. Chlorofluorocarbons
B. Methane
C. Carbon dioxide
D. Nitrogen
Answer: Option D
A. Chlorofluorocarbons
B. Methane
C. Carbon dioxide
D. Nitrogen
Answer: Option D
The term 'brown air' is used for
A. Acid fumes
B. Photochemical smog
C. Sulphurous smog
D. Industrial smog
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