Which of the following gases is regarded as an atmospheric pollutant?

1.	Which of the following gases is regarded as an atmospheric pollutant?
A.	\[{{O}_{2}}\]
B.	\[{{O}_{3}}\]
C.	\[S{{O}_{2}}\]
D.	\[{{N}_{2}}\]
Answer» D. \[{{N}_{2}}\]

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Which of the following gases is regarded as an atmospheric pollutant?

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