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Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
Explanation
$N_2O_5$ is not a common atmospheric pollutant.
Detailed Solution
Fact: $N_2O$, NO and $NO_2$ are common atmospheric pollutants from natural and human activity, whereas $N_2O_5$ is not.
So the answer is $N_2O_5$.