论文部分内容阅读
人离不开水,过去,也许只是航海的人感觉到淡水的压力,而近100年来,随着现代文明的发展,很多人越来越紧迫地感觉到水的危机。一方面人类活动对水体的污染越来越严重,可用淡水相对减少,另一方面,人类对淡水的需求量越来越大。本来地球是个多水的星球,无奈人类只能依靠淡水生存。地球上的水97.3%都存在于海洋,不能用于人类的生产和生活,当人类感觉淡水短缺之时,看着这占地表面积71%的大海,人类总有望洋兴叹之感。如何把海水变成淡水,这在科学上是个既简单又复杂的问题。
People can not do without water. In the past, perhaps only the sailing people felt the pressure of freshwater. For the past 100 years, with the development of modern civilization, many people are feeling the water crisis more and more urgently. On the one hand, human activities are more and more serious on the water pollution, the availability of fresh water is relatively reduced, on the other hand, the human demand for fresh water is growing. Originally the Earth is a watery planet, but unfortunately humans can only rely on fresh water to survive. 97.3% of the earth’s water is present in the ocean, can not be used for human production and life, when humans feel the shortage of fresh water, looking at the surface area of 71% of the sea, the human world is always hopeful feeling. How to turn sea water into fresh water is a scientific problem that is both simple and complex.