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水资源短缺 Water Shortage
People can't imagine life without water. Without it, the earth we live on would be a dead one. There would be no trees, no crops, no animals and no people. So water is considered to be next to oxygen in importance.
Although nearly three quarters of the earth's surface is covered with water, it is sea water and undrinkable. The demand for water is increasing, while water resources are scarce. Agricultural production needs enormous amounts of water, so does industry. Besides, the rapid growth of population makes it more and more difficult for people to survive because of the water shortage. So water shortage has become one of the most serious problems.
Fortunately, people have realized this pressing problem and are trying to find ways to salve it. First, people are urged to economize on water. Second, measures are taken to protect water resources. Third, circulating water is used for industrial purposes over and over in factovies and treated sewage water is used for irrigation in farming land.
人们不能想象没有水的生活，没有它，我们居住的地球是一个死的。就没有树木、没有庄稼、没有动物和人，因此水被认为在重要性仅次于氧。
虽然近3/4的地球表面被水覆盖，它是海水，不能饮用。人类对水的需求正在增加，而水资源的匮乏。农业生产需要大量的水，那么产业。此外，因为水的短缺，人口的迅速增长使人们的生存越来越困难，因此水资源短缺已成为最严重的问题之一。
幸运的是，人们认识到这个问题并试图寻找解决的方法。首先，人们呼吁节约用水。第二，采取措施保护水资源。第三，循环水用于工业用途，遍地和处理的污水用于灌溉农业土地。
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