What type of pollutants released by vehicles leads to air pollution?

What type of pollutants released by vehicles leads to air pollution? Correct Answer Carbon monoxide

Pollutants like Carbon monoxide released in the air due to incomplete combustion of fuel from vehicles leads to pollution, Nitrogen and hydrogen are naturally present in the air and methane is released by activity of methanogens.
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A passage with three blanks,followed by five options, each containingone word, is given. Choose the word thatcan fill all the three blanks.
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In the question given below,three paragraphs are given, which arejumbled. Find the correct sequence ofthese paragraphs so that they form ameaningful passage.
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IRDAI has directed all third-party insurance companies to include vehicle insurance policies cover to vehicle owners-drivers of all vehicles (two-wheelers, three-wheelers, passenger vehicles and commercial vehicles) for an additional premium of-