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水是老生常谈的话题。我们都知道“水乃生命之源”,我们知道我们居住在濒临失衡的星球上面;这个星球有2/3为水体所覆盖;但沉甸甸的生灵已使它喘为过气来,人类自身的行为使居住环境每况愈下。 据统计,地球每天约增加25万人,每过21年,全世界水的需求量就增加一倍。发展中国家的工业化和现代化使城镇倍增,到2000年时,将有50％的世界人口居住在城镇,
Water is a common topic. We all know that “water is the source of life,” and we know that we live on an unbalanced planet; two-thirds of this planet is covered by water; but heavy creatures have made it over-breath and human behavior Make the living environment worse. According to statistics, the Earth increases by about 250,000 people every day. Every 21 years, the world’s water demand has doubled. The industrialization and modernization of developing countries have doubled the size of urban areas by the year 2000, when 50% of the world’s population will live in cities and towns,