The pH of acid rain is

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

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

Higher the BOD, lower would be

If the source of water pollution can be identified as a specific site, it is called

The ultraviolet radiations in the stratosphere are absorbed by

Absorption techniques are used to control

Brown air in traffic congested city is caused by

Major source of methane in India is