Question

Air pollution is not caused by

• A. Pollen grains
• B. Hydroelectric power
• C. Industries
• D. Automobiles

Answer 1

The correct option is B Hydroelectric power

Hydroelectric power is the cleanest form of electricity generation without contributing to the air pollution as it does not require the burning of fuel for working and water is provided by a natural force and moreover, it is renewable by rainfall causing refilling of reservoir. The dams are built which provide storage and it helps in reducing greenhouse gases emissions apart from the fact that once it becomes operative these have a low maintenance cost.

A. Pollen grains cause respiratory allergies.

B. Hydroelectric power does not release any pollutant.

C. Industries release oxides of carbon, sulphur and nitrogen and particulate matters.

D. Automobiles also release oxides of carbon, sulphur and nitrogen.

Hence, the correct answer is 'Hydroelectric power'.