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

Which of the following steps can be taken to control global warming?
$I-$ Reducing the use of fossil fuels.
$II-$ Improving energy efficiency.
$III-$ Deforestation.
$IV-$ Afforestation.
$V-$ Increasing human population growth.

What is the recommended forest cover for plains and hills according to the National Forest Policy of $1988$?

$A$ pollutant is an agent which causes change in

For which major rivers in India has the Ministry of Environment and Forests initiated action plans?

The per capita forest area in India is ......... (in $ha$)