森林砍伐的背景 英语作文
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Forest and mankind, mankind intimate partners, is an important part of the global ecological system. If there is no forest land, most biological extinction, the vast majority of water will flow into the ocean; the oxygen in the atmosphere will reduce, carbon dioxide will increase; the temperature can significantly increased, flood and drought disasters occur frequently. Forest, but also can improve the air quality, reduce soil loss, water conservation, reduce the harm of sand blown by wind, reduce noise pollution, beautify the environment and so on. The forest is precious natural resources, is the human to pillar foundation, and was known as the "lungs of the earth". Why the forest to maintain the ecological balance has an important role? First of all, the nature of all need oxygen to sustain life, and forest is a natural oxygen machine, if the forest and other green plants, is destroyed, the biological survival loses safeguard. In addition, the forest can regulate the temperature, stop acid rain, dust, noise is attenuated, reducing wind, reduce natural disasters. Destruction of forest resources to environmental impact is very serious, loss of ecological balance. Caused by high temperature, air quality is bad, also caused the extinction of wild animals.

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