以 Words I will Never Forget 为题，写一篇100词左右的英语作文

我永远不会忘的词。这个题目很广泛，永不忘记，可以是 感恩，学习，爱，真诚，信心等等。你可以抓住一个词，或几个相关联的词，加几个实例，三百不成问题。

1.
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 responsi