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

Which one of the following is a non-renewable exhaustible natural resource?

Snow-blindness in the Antarctic region is due to

Which of the following is $NOT$ a serious effect of deforestation?

Identify the correct statements from the following:
$(i)$ $DDT$ is non-biodegradable.
$(ii)$ Heavy metals are responsible for biomagnification.
$(iii)$ High concentration of $DDT$ disturbs calcium metabolism in birds.
$(iv)$ The concentration of $DDT$ in large fish can be up to $2 \, ppm$.

Assertion: Deforestation is one main factor contributing to global warming.
Reason: Besides $CO_2$,two other gases,methane $(CH_4)$ and $CFCs$,are also included under greenhouse gases.