Which gas,present in the exhaust gases from a motor car, is not a pollutant?
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Explanation:
The largest part of most combustion gas is nitrogen (N2), water vapor (H2O) (except with pure-carbon fuels), and carbon dioxide (CO2) (except for fuels without carbon); these are not toxic or noxious (although water vapor and carbon dioxide are greenhouse gases that contribute to global warming).
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Answer: it's fly ash. It is produced due to incomplete burning of fossil fuel.
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