Highest percentage of air consists of 

_______ percent of oxygen present in air. 

Eutrophication leads to death of fish due to 

Green house gas is 

____________is derived from the Latin word"polluere"

Air pollution causes 

__________is an indication of disturbances to the composition of compound in the atmosphere.

____________is defined as the release of substances and energy (in excess of permissible limit) as waste products into the environment.

We receive natural radiation from

The heaviest of the particle emissions are: