Recycling is considered a welcome practice to deal with environmental problems. Justify this statement with two arguments.

It is important to make small check dams across the flooded gullies because they
$(i)$ hold water for irrigation
$(ii)$ hold water and prevent soil erosion
$(iii)$ recharge ground water
$(iv)$ hold water permanently

Although coal and petroleum are produced by the degradation of biomass,we still need to conserve them. Why?

Which of the following is the correct match between List-$I$ and List-$II$?

List-$I$	List-$II$
$1$. Python	$a$. Tapti River
$2$. Hangul	$b$. Sabarmati River
$3$. Monal	$c$. Endangered Mammal
$4$. Dharoi Dam	$d$. Endangered Reptile
	$e$. Endangered Bird

The $Dharoi$ dam is built on which river?

The Arabari forest of Bengal is dominated by: