Match the following.

Column-$I$	Column-$II$
$(p)$ Increasing level of $CO_2$	$(i)$ Ozone depletion
$(q)$ $CFC$	$(ii)$ Antarctica region
$(r)$ Ozone hole	$(iii)$ Greenhouse effect
$(s)$ $UV$ rays	$(iv)$ Senescence of skin

The major pollution-causing agent is:

Consider the following statements about Ramesh Chandra Dagar's work in the field of organic farming:
$I.$ Ramesh Chandra Dagar's work includes bee-keeping,dairy management,water harvesting,composting,and agriculture in a chain of processes.
$II.$ In this process,there is no need to use chemical fertilisers for crops as cattle excreta is used as manure.
$III.$ Crop waste is used for making compost,which is used as natural fertilizer.
$IV.$ Compost generates natural gas,which is used for the energy needs of the farm.
Which of the statements given above are correct?

Estuaries occur in which of the following Indian states?

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

Which of the following is $NOT$ true regarding the Bhopal Gas Tragedy?