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人们无休止地砍伐森林树木,以满足日益增长的各种需要。从薪柴取暖到土木建筑,从制做家具到造纸印书,这无疑是人类文明不断发展的过程。然而,在斧砍锯伐之后,森林遭到了破坏,树木逐渐减少,于是在繁荣往会的背后,出现了令人担忧的问题。树木对每个人都有益大地绿树成荫,遮蔽烈日暴晒;繁枝轻摇,酷暑送爽;片片嫩叶,在太阳下蒸发着水分,降低盛夏的气温,在干燥时又散发着水分,增加空气的湿度;树木不但把我们呼出的和城市排放的二氧化碳吸收加以利用,而且还释放出氧,使空气新鲜无害;树木成
People endlessly deforest trees to meet the growing needs. It is undoubtedly the process of the continuous development of human civilization from heating firewood to civil engineering and from making furniture to making paper and printing books. However, after the ax was cut, the forest was destroyed and the trees gradually diminished, so behind the boom there was a worrying issue. Tree beneficial to everyone on the tree-lined, cover the sun exposure; Fanzhi shake, cool and cool; piece of leaves, the evaporation of the water in the sun, reducing the temperature in midsummer, when dry and exudes moisture, Increase the humidity of the air; trees not only make use of the carbon dioxide emissions exhaled by us and the city, but also release oxygen to make the air fresh and harmless;