1.
Source of energy
2.
Source of fooder and shelter
3.
Source of raw materials
4.
Control of flood, land slide and soil erosion
5.
Sources of water
6.
Recreational spot
7.
Protection of crops
8.
Sources of public revenue
9.
Sources of construction materials
10.
Sources of foreign exchange
11.
Ecological balance
12.
Sources of furniture
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