Which of the following is an inexhaustible resource?

World Environment Day is celebrated on

In order to protect and improve the quality of our environment,the government of India passed the Environment (Protection) Act in which year?

Arrange the following in increasing order of their $BOD$ values: Sewage $(S)$,Distillery Effluent $(DE)$,Paper Mill Effluent $(PE)$,and Sugar Mill Effluent $(SE)$.

The forest cover in India is approximately .....

Who is concerned with organic farming?