Phosphate pollution is caused by

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

According to the $1991$ census,what was the rural population of India (in $\%$)?

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

Consider the following reasons for the massive fish mortality observed in a lake near a village within a few days:
$(1)$ Excessive use of urea and phosphate fertilizers in nearby crops.
$(2)$ Spraying of $DDT$ using aircraft.
$(3)$ The lake water turned green and foul-smelling.
$(4)$ Initial decrease in phytoplankton in the lake leads to a maximum decrease in photosynthesis.
Which of the above reasons are responsible for the massive fish mortality?

In order to control environmental pollution,the Government of India has passed the .......... to protect and improve the quality of our environment.