根据提示写一篇 80 － 100 字左右的短文,说明树木对于人类的重要性.
提示： 1. 树木可以美化环境 (beautify the environment) ,有助于净化空气,有益于身心健康.
2 ．木材有许多用途,不但可用于建筑,还可用于制造许多其他的东西.例如,我们家中的许多东西都是木制的.
3 ．我们应广植树和保护树木,严禁乱砍滥伐,以保持生态平衡 (the balance of nature) .
参考例文： Trees can beautify the environment and help to make the dirty air clean. It also will be good for our health. It can not only be used for building houses and making paper, but also can be used to make many other things. For example, many things in our houses are made of wood. So we must plant more trees and mustn't cut down trees. We must try to keep the balance of nature.
写作素材：
Absorb carbon dioxide and release oxygen; Absorb a toxic gas and check atmosphere pollution; Drive a bacterium and sterilize; Hinder dust; Reduce noise; Absorb radioactive matters; Produce a gentle breeze dispeling atmosphere pollution; The source of water prepares ability to control self conserving water and soil; Saposhnikovia divaricata stabilization of sands; Regulate climate; Beautify the environment; Provide wood; The carbon- oxygen maintaining biosphere balances building material; And so on
吸收二氧化碳并释放氧气；
吸收有毒气体和检测大气污染物；
驱菌和杀菌；
阻滞粉尘；消减噪声；
吸收放射性物质；
产生微风驱散大气污染物；
涵养水源和保持水土；
防风固沙；
调节气候；
美化环境；
提供木材；
维持生物圈碳－氧平衡
建筑材料；
等等
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