About 99% atmosphere’s mass lies within:

Depending upon temperature variation, atmosphere is divided into how many regions?

Just above the Earth’s surface is:

A group of gases that maintains temperature of atmosphere is:

The Earth’s atmosphere is getting hotter because of

Which one of the followings is not a Greenhouse Effect?

Normally rain water is weakly acidic because of:

Buildings are being damaged by acid rain because it attacks:

Acid rain affects the aquatic life by cloging fish gills because of:

Which one of these pollutants are not found in car exhaust fumes?

Ozone is beneficial for us as it:

Which one of the following is not an air pollutant?

Infrared radiations emitted by the Earth are absorbed by:

Global warming causes rising of the sea level. The cause of global warming is:

16. Effects of ozone depletion are following except the one;

Global warming is because of:

Which gas protects the Earth’s surface from ultraviolet radiations?