Prevention and control of soil erosionĀ 
control of floods
checks on spread of deserts
increase of soil fertility
effect on climate
1. forests are a home to variety of animals birds insects reptilesĀ & plants.
2.they stop the soil & prevent erosion of it.
3.they help to increase amount of oxygen.
4.they help to increase the amount of rainfall in that region.
5.the medicinal trees provide the raw materials for making the medicines.
6.some trees provide wood for making furniture.

hope it's enough....
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