Question

What percentage of pollutants is gaseous in nature?

(a) 75%

(b) 80%

(c) 99.9%

(d) 90%

This question was addressed to me by my college professor while I was bunking the class.

My question is from Air Pollution in section Air Pollution of Environmental Engineering

Answer 1

The correct choice is (d) 90%

To explain I would say: Nearly 90% of the air pollutants are gases.