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森林是人类的一项宝贵资源,是地球上陆地生态系统的主体,同时森林还是一种环境资源,它具有净化空气、吸烟滞尘、涵养水源、保持水土、防风固沙、保护农田、调节气候、美化环境和减弱噪声等功能。 经研究得知,一公顷阔叶林每年能够吸收CO_21000kg,放出O_27730kg(足够654人一天呼吸之用),净化空气1.8×10~6m~3。5公顷森林所含蓄的水量,相当于15座库容为10~6m~3。的水库的水量;森林保护下的农田,风速平均可降低40～50％,比无保护的农田每公顷可增产粮食23～53kg;一公顷森林,一天可蒸发水分1800t,吸收热量1.88×10~9J;森林空气湿度比无林区高15～
Forests are a precious resource for human beings. They are the main body of terrestrial ecosystems on the earth. At the same time, forests are also an environmental resource. They have the advantages of air purification, smoke stagnation, water conservation, water and soil conservation, wind and sand fixation, protection of farmland, and regulation of climate. Beautify the environment and reduce noise and other functions. According to the study, one hectare of broad-leaved forest can absorb CO_21000kg per year, release O_27730kg ( enough for 654 people to breathe a day), clean the air contained in 1.8×10~6m~3.5ha of forest, equivalent to 15 sets of storage capacity. It is 10~6m~3. The amount of water in the reservoirs; the farmland under the protection of forests, the average wind speed can be reduced by 40 to 50%, compared with unprotected farmland, the yield can be increased by 23 to 53kg per hectare; a hectare of forest can evaporate 1800 tons of water a day and absorb heat 1.88×10~ 9J; forest air humidity is 15~ higher than non-forest area