Why is $Van Mahotsav$ celebrated?

$Reforestation$ is the process of restoring a forest that once existed but was removed at some point in the past.

What is the percentage of forest loss in tropical and temperate regions,respectively?

At the beginning of the $20^{th}$ century,forests covered about $......\%$ of the total land area of India,and by the end of the century,this had shrunk to $........\%$.

In India,Jhum cultivation is practiced mainly in

The process of planting trees in a forest area to increase forest cover is known as ..........