Among the following, which air pollutant is considered the most harmful to the environment?

Chemical Environmental Engineering MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Chemical Environmental Engineeringchemical-engineering › chemical-environmental-engineering-chemical-engineering
Published
11 Mar 2019
Last updated
28 May 2026

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Explanation

Nitrogen oxides (NOx) are regarded as the most damaging air pollutants because they contribute significantly to smog formation, acid rain, and respiratory problems, making them more severe compared to hydrocarbons, sulfur dioxide, and carbon monoxide.

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