The atmosphere in big cities is polluted mostly by:
Radioactive fallout
Household wastes
Automobile exhausts
Pesticide residues
A
Radioactive fallout
B
Household wastes
C
Automobile exhausts
D
Pesticide residues
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Solution
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Automobiles burn fuels like petrol and diesel inefficiently causing 80 percent of air pollution in urban areas. They release unburnt hydrocarbons, carbon monoxide, nitrogen oxides, sulphur oxides, ammonia, aldehydes, and lead.
Hence, the correct answer is option C.
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