$NEERI$ is situated in

The limit of $BOD$ prescribed by the Central Pollution Control Board $(CPCB)$ for the discharge of industrial and municipal wastewater into natural surface waters is

In the $1990s$,Delhi ranked ............. among the ...... most polluted cities of the world.

For which major rivers in India has the Ministry of Environment formulated an action plan?

Identify the correct statement regarding Eutrophication.

The maximum biomagnification would be in which of the following in case of an aquatic ecosystem?