question_answer

Generally speaking, the atmosphere in big cities is polluted most by [BHU 1990; AMU 1991]

A) Radioactive fall out

B) Household waste

C) Automobile exhaust

D) Pesticide residues

Correct Answer: C

Solution :

Because the number of automobiles in big cities is very high and automobile exhaust have many atmospheric pollutants like , and oxides of lead etc.