Which of the following is a secondary pollution ?.

Wind blown acidic gases and particles settle down from the atmosphere on to the earth is called

The ultraviolet radiations in the stratosphere are absorbed by

PAN is seen in

If the solar radiation is less the photo chemical smog formation becomes incomplete, the air is called

Which one of have low rate of air pollution

Higher the BOD, lower would be

The process of deposition of acid on earth from the atmosphere is called