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联合国早在1977年2月就向全世界发出警告:“水不久将成为继石油危机之后的另一个更为严重的全球性危机。”它果真不幸而言中了:目前全世界正面临着一场严重的、普遍的水危机! 据统计,全世界有100多个国家缺水,严重缺水的已达40多个。水源不足已成为许多国家国民经济发展的重要障碍。世界卫生组织估计,全世界约有8/4的农村人口和1/5的城市人口常年得不到足够的淡水供应,大约有10亿以上的人由于饮用被污染的
As early as February 1977, the United Nations warned the world that “water will soon become another, more serious, global crisis following the oil crisis.” It is, unfortunately, very unfortunate: the world is facing a According to statistics, more than 100 countries in the world have water shortages and more than 40 in serious water shortages. Inadequate water has become an important obstacle to the development of the national economy in many countries. WHO estimates that about 8/4 of the rural population and 1/5 of the urban population in the world do not receive enough fresh water all year round, and about 1 billion people are polluted by drinking