Question

Atmosphere of big/metropolitan cities is polluted most by ________.

• A. Automobile exhausts
• B. Pesticide residue
• C. Household waste
• D. Radio-active fall-out

Answer 1

The correct option is A Automobile exhausts

In the big/metropolitan cities, the major cause of air pollution happens to be the vehicular exhaust containing the oxides of carbon, nitrogen, sulphur and particulate matter. The increase in the population and enhanced living standards cause the increase in the number of vehicles plying on the roads. Their exhaust contributes greatly to the worsening of the air quality.

B. Pesticide residue causes water and soil pollution.

C. Household waste causes soil pollution.

D. Radio-active fallout causes soil and water pollution.

Hence, the correct answer is 'Automobile exhausts'.