in big cities air pollution is mainly due to
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air pollution is mainly due to smoke that comes from factories and vehicles.
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1. LARGE NUMBER OF INDUSTRIES.
2.LACK OF PEOPLE AWARENESS.
3.LARGE NO.OF VEHICLES.
pls mark this as brainlist
2.LACK OF PEOPLE AWARENESS.
3.LARGE NO.OF VEHICLES.
pls mark this as brainlist
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