Is it necessary to replenish forests?

It is very necessary to replenish forests as forest control the following things: 

(i) Rainfall. Trees give out enormous amount of water during transpiration. This water vapour helps in the formation of rain clouds. If trees are killed and not replenished , it will reduce the rainfall in the area 

(ii) Soil erosion. If trees are cut at a large rate the soil becomes uncovered. The top soil which is rich in organic matter will be washed away by water or carried away by wind. It may lead to the formation of a desert.erosion may lead to the formation of desert.

(iii) Carbon dioxide-oxygen balance. Forests have very large number of trees. They give out O₂ and take in CO₂ in day time during photosynthesis. Thus they help in maintaining carbon dioxide-oxygen balance in the atmosphere.

(iv) Natural growth of trees. Forests cannot be grown in a few days or months. Trees take years together to grow their heights.

It is, therefore, necessary to replenish forests at proper time, i.e., we must plan and grow trees and avoid indiscriminate cutting down of forests.