当前，我们正在提倡创建“节约型社会”，请阅读并理解电视广告词“If we don’t save water．the last drop of water will be a teardrop．”结合下面提示写一篇80词左右的短文。
内容提示：
(1)生活离不开水；
(2)饮用水(water suitable to drink)的数量在减少；
(3)水污染严重。
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It’s well known that water is very important to man．We can’t live without water．The amount of water which is suitable to drink is falling quickly．But some people don’t care about it．They waste a lot of water in their daily life．Even worse，they pour dirty water into rivers．They throw rubbish into rivers，too．Many rivers and lakes seriously polluted．Something must be done to stop the pollution．In this way，We can live happily．If we don’t save water，the last drop water will be a teardrop．
