That is very easy bhaiya I can give you few points so that you can write your chitralekhan they are:-
1)Deforestation is the permanent destruction of forests in order to make the land available for other uses. An estimated 18 million acres (7.3 million hectares) of forest, which is roughly the size of the country of Panama, are lost each year, according to the United Nations' Food and Agriculture Organization (FAO).
2)Deforestation occurs around the world, though tropical rainforests are particularly targeted.
There are many causes of deforestation.
To make more land available for housing and urbanizationTo harvest timber to create commercial items such as paper, furniture and homesĀ To create ingredients that are highly prized consumer items, such as the oil from palm treesTo create room for cattle ranchingĀ 
I hope it helps you bhaiya my best wishes are with you