The forest is the vegetation of the trees on the Earth's surface, a tremendous role for people such as: providing wood, firewood, climate, generate oxygen, water, plant and animal shelter and storing the rare genetic resources.A hectare of forest annually, creating about 300 biomass-500 kg, 16 tons of oxygen (pine forest plantation, 3-30 tons 10 tons).Each person a year need 4,000 kg O2 oxygen intake by the corresponding 1000-3000 m ² of green create a year.Air temperature is often lower than the forest ground temperature of about 3-5° C.Protect forests and prevent wind storm.The amount of soil erosion of forest land only by 10% the amount of soil erosion of the land without forests.The forest is the source of endless human genes, is of rare plant and animal species.
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