Expand the term DDT ?

Which causes brown air in traffic congested city ?

Burning in the presence of oxygen is called :

Bhopal Gas Tragedy was in the year ?

When was the forest Act  established, by Government of India ?

Releasing of hot water into water bodies is known as :

Black lung disease is caused due to which pollution ?

Mixture of smoke and fog is called :

Which is the unit of sound level ?

Which is generated during the burning of coal and petroleum products ?