Which of the following is not a pollutant?

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Question

(B) The correct answer is $B$. Hydrogen $(H_2)$ is a clean gas and is not considered a pollutant. Sulphur dioxide $(SO_2)$ and Carbon monoxide $(CO)$

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Carbon dioxide

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(B) The correct answer is $B$. Hydrogen $(H_2)$ is a clean gas and is not considered a pollutant. Sulphur dioxide $(SO_2)$ and Carbon monoxide $(CO)$ are primary air pollutants that cause respiratory issues and environmental damage. While Carbon dioxide $(CO_2)$ is a greenhouse gas,it is a natural component of the atmosphere. It is not classified as a pollutant at normal concentrations; however,its excessive concentration leads to global warming and the greenhouse effect.

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