Which one of the following is not included in the National Air Quality Index?
A. Sulphu
B. Nitrogen dioxide
C. Lead
D. Methane
Answer: Option D
This Question Belongs to Chemistry GK Chapter Wise >> Environmental Chemistry
Related Questions on Environmental Chemistry
The term 'brown air' is used for
A. Acid fumes
B. Photochemical smog
C. Sulphurous smog
D. Industrial smog
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