Aerosols reduce primary productivity by

Domestic sewage mainly contains $A$ wastes which are readily decomposed with the help of $B$. Here $A$ and $B$ refer to:

Approximately $P$ fraction of the solar radiation reaching the Earth is reflected by clouds and gases,and another $Q$ fraction is absorbed by them.

The Government of India has introduced a concept to work closely with local communities for the protection and management of forests,which is called:

The warm Peruvian current that appears every $5$ to $8$ years off the coast of South America in the eastern Pacific is known as:

$UV$ radiation from the sun causes which of the following eye disorders?