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Question
In metropolitan cities air pollution is mainly due to ______.
Fill in the Blanks
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Solution
In metropolitan cities air pollution is mainly due to automobile exhausts.
Explanation:
The heavy traffic in large metropolitan areas results in significant emissions from vehicles. This combustion of fuels in automobiles releases various pollutants, such as nitrogen oxides, hydrocarbons, carbon monoxide, and particulate matter, which contribute heavily to air pollution and the formation of smog in these cities.
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