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Protect the air
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Today many trees in forests are cut down. A lot of land has become desert (沙漠). If you read you'll learn that the forests on the .earth are getting smaller all the time. Some scientists that there will not be any great forests in 20 or 30 years.
What will if all forests disappear? A 10t of plants will die and animals will their home. Farmland will soon into desert. There won't enough rain and the weather will be and dry. The life will be for everyone. Our living will become worse and worse. It is our duty to the forests. Everyone should try best to take care of forests. Stop cutting down trees and make the world greener!
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