The wealth of a nation can be determined on seeing the area of the forest coverage. If there is a green forest, the inter dependant species, i.e. animals also will flourish. So, increasing the forest area and maintaining the present forest land will help the country to prosper and to march forward to the path of developed countries. FOREST are the assets of the nation. The growth of the forest mainly depends upon the rain and also where it is situated. In the areas like the gangetic delta has got thick forests. In the hilly terrain, cony- leaf trees forest are there. Thus the forest maintains ecological balance of the country.

Land that has a dense cover of trees and shrubs is called a forest. The forests requires abundant sunlight, temperature and rainfall. Taking in to consideration the types of trees and climatic conditions of the area, the forests are classified as:

• Tropical evergreen forest – where the rainfall is more than 300 cms.
• Semi evergreen forest – where the rainfall is (up to 200 cms.)
• Tropical deciduous forest – where the rainfall is between 100 to 200 cms.
• Thorn forest – where the rainfall is less than 80 cm.
• Tidal forest along the rivers
• Mangroove forest on the Sundarban forest in ganga delta.