【要求】

　　世界环境日到来之际，你将代表你们班以一个污染的环境为题向全校同学发出一封倡仪书，先描述列举环境污染对人类健康的危害，然后号召大家保护环境。

　　【范文】

　　A Polluted Environment

　　Environmental pollution is a serious social problem. It poses a terrible threat to men’s health.

　　The atmosphere is filthy. The air is thick with dust and burnt oil. Dark smokes are being emitted from chimneys, and choking fumes are being released from numerous vehicles. Stay a little while in a big city, then wipe your forehead with your handkerchief, it is black. Hang out your washing on the line to dry, you will have to wash again. Garbage is left to accumulate in unsanitary heaps that attract flies and give off bad smell. Nor is the pollution confined to air and land. Large quantity of sewage and chemical waste are dumped daily into rivers, lakes and the sea, which kills millions of fish. Noises coming from honking cars, rumbling machines and broadcasting loudspeakers may make a person nervous and irritable, even drive him crazy.

　　Environmental pollution is responsible for many diseases that are disabling, or bringing death to human beings.

　　In short, let’s take good care of our mother globe, not only for the well-being of ourselves, but also for that of our future generations.

　　【评语】

　　本文是描写文，以主观描写的方式，具体、形象地描绘了被污染的环境。文章突出强调了污染对人体健康有极大危害这一主题。语言简练有力，句式总体上讲也较简单，但有效地表达了倡议书所需的语气。文章感染性强，特别是以祈使句作结，增强了本文的号召性。

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