Forest occupies roughly 35-40% of the land surfaces of the earth. In Pakistan the forest occupy about 6% of the total land area. The forest of the world have been classified into three kinds as coniferous, temperate and tropical forest. Coniferous forests are confined to Northwern Hemisphere where summer is short and winter is long and very cold. The temperature forest found in USA. Western Europe and East Asia, have mild temperature and moderate rain fall. The tropical rain forest grows in equatorial region where humidity is high, rainfall is heavy and annual average temperature is about 28 C. The fauna and flora of different kinds of forest varies from each other. Among all, the tropical rain forests are most rich, s sprites composition.
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