Sometimes factories are established after destruction of forest. Thus for a small gain there is an irreparable loss. In this process precious plant, wild animals and rare birds are destroyed and the quality of environment is adversely affected. A factory should be established on a waste land away from the urban population. Supply of raw materials to the forest based industries is another major cause of forest destruction in the hills. The forest based industries such as Resin and Turpentine industry are also responsible for destruction of trees in the hills.