What is the recommended forest cover for plains and hills according to the National Forest Policy of $1988$?

Read the following statements carefully and select the correct ones.
$I.$ $UV$ rays are essential for the production as well as degradation of ozone gas.
$II.$ Ozone present in the ionosphere acts as a shield absorbing $UV$ radiation coming from the sun.
$III.$ One-fourth of the incoming solar radiation is reflected by the atmospheric gases and clouds,and only half of the incoming solar radiation falls on the earth's surface,heating it. Of this,only a small portion is reflected back.

What is the primary cause of desertification?

Where was the Kyoto Protocol adopted?

The Kyoto Protocol has specified the commitments of different countries to:

Choose the correct option for the following sentences:
$(1)$ Reducing deforestation
$(2)$ Reducing the use of fossil fuels
$(3)$ Planting trees
$(4)$ Slowing down the growth of the human population.