论文部分内容阅读
水,是生命之源,没有水就没有生命。今天,由于世界人口的爆炸式增长,人类对水资源的掠夺式摄取,以及环境污染等,使世界上大约有一半的国家、1/3的人口面临水荒的威胁。当然,这里所说的水荒,是指可供人们生活、生产使用的淡水资源的不足。其实,地球并不缺乏水。大家知道,地球表面71%的面积被水所覆盖,水体总量达到近14亿立方千米,但淡水仅占水体总量的2.53％,余下的97.47％是海洋水和咸湖水。显然,若能把这97.47％的水也利用起来,人类就再也不用为水资源的不足而发愁了。
Water, the source of life, has no life without water. Today, about one-third of the world's population and one third of the world's population are now exposed to the threat of water shortages due to the explosive growth of the world's population, predatory human consumption of water resources and environmental pollution. Of course, the shortage of water referred to here refers to the shortage of freshwater resources available to people for living and production. In fact, the Earth is not lack of water. As we all know, 71% of the Earth's surface area is covered by water. The total volume of water reaches nearly 1.4 billion km3. However, fresh water accounts for only 2.53% of the total volume of water. The remaining 97.47% of the total is ocean water and salty water. Obviously, if this 97.47% of the water can also be used, humans will no longer have to worry about the shortage of water resources.