Generally speaking,the atmosphere in big citi | vedclass

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(C) The correct answer is $C$. In large cities,the primary source of atmospheric pollution is the exhaust from automobiles. Vehicles emit a significan

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Automobile exhaust

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(C) The correct answer is $C$. In large cities,the primary source of atmospheric pollution is the exhaust from automobiles. Vehicles emit a significant amount of harmful pollutants into the air,including carbon monoxide $(CO)$,sulfur dioxide $(SO_2)$,nitrogen oxides $(NO_x)$,and particulate matter,along with lead compounds. Due to the high density of traffic in urban areas,these emissions accumulate,leading to severe air quality degradation.

Generally speaking,the atmosphere in big cities is polluted most by

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