Question : The most serious air pollutant causing health harzard is:
Option 1: Sulphur dioxide
Option 2: Carbon monoxide
Option 3: Ozone
Option 4: Nitrogen oxide
Correct Answer: Sulphur dioxide
Solution : The correct option is Sulphur dioxide
Sulfur dioxide (SO2) is a major atmospheric pollutant that may impair both human health and the environment. It is mostly created by the combustion of fossil fuels and industrial activities, causing respiratory problems and the development of acid rain.
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