Who is concerned with organic farming?

Match the following columns:

Column-$I$	Column-$II$
$(a)$ Biomagnification	$(1)$ Nitrates and Phosphates
$(b)$ Eutrophication	$(2)$ Chlorine
$(c)$ Global warming	$(3)$ $DDT$
$(d)$ Ozone depletion	$(4)$ Greenhouse gases

Assertion: Presently,the global atmosphere is warming up.
Reason: The depletion of the stratospheric ozone layer has resulted in an increase in ultraviolet radiations reaching the earth.

During the past century,the temperature of the Earth has increased by: (in $^{\circ}C$)

At the beginning of the twentieth century,forests covered about ....... of the land of India. By the end of the century,it shrunk to.......

Which of the following is not dangerous for life and the atmosphere?