Burning of fossil fuels affects which of the following cycles?

Which of the following organisms is likely to have the highest concentration of $D.D.T.$ in its body?

The greatest problem of water conservation is to reduce the amount of

Match the following important dates/events related to environmental issues in India:
$A$. $2002$
$B$. $1$ April $2005$
$I$. Bharat Stage $II$ applicable to all automobiles in the country.
$II$. All buses of Delhi were converted to run on $CNG$.

More than $70\%$ of the world's freshwater is contained in $............$.

Match the following columns regarding environmental acts and protocols:

Column-$I$	Column-$II$
$(a)$. Environmental Protection Act	$(i)$. $1988$
$(b)$. Air (Prevention and Control of Pollution) Act	$(ii)$. $1987$
$(c)$. Water (Prevention and Control of Pollution) Act	$(iii)$. $1981$
$(d)$. Montreal Protocol	$(iv)$. $1974$
$(e)$. National Forest Policy	$(v)$. $1986$