What are the reasons for depletion of forests?

Reasons for depletion of forest are given below:
(i) Indiscriminate cutting of trees for setting up industries.
(ii) Agricultural expansion, development of railways, mining, commercial and social forestry.
(iii) Mining is another important factor for depletion of forest. It disturb the natural habitat of many species and migration of animals.

(iv) Setting up new urban settlement.