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最近,联合国发表了《世界水资源综合评估报告》,向全世界发出了淡水资源短缺的警报。报告说,缺水问题将严重制约下个世纪的经济和社会发展,并可能导致国家间冲突。报告指出,目前全世界1/5以上的人口,即12亿人面临“中高度到高度缺水的压力”。报告预测,到2025年世界人口将增至83亿,第三世界国家的城市面积也将随之大幅度增加,除非更有效地使用淡水资源、控制河流和湖泊污染以及更多地利用净化后的废水,否则全世界将有1/3的人口遭受“中高度到高度缺水的压力”(农业、工业和人们生活用水短缺20％尚属安全。短缺20％～40％的地区即属中等紧张程度,而短缺超过40％的地区,则属于高度紧张的程度)。我们在
Recently, the United Nations published the “World Water Assessment Report”, which sent an alarm to the world about the shortage of fresh water resources. The report said that water scarcity will seriously restrict the economic and social development in the next century and may lead to conflicts among nations. The report pointed out that at present, more than one fifth of the world’s population, or 1.2 billion people, is under “moderate to high water stress.” The report predicts that the world population will increase to 8.3 billion by 2025 and the urban area in third world countries will also increase substantially unless more efficient use of freshwater resources, control of river and lake pollution and greater use of purified Or one third of the world’s population will suffer “moderate to high water stress” (agriculture, industry and people living in water shortage of 20% is still safe. Shortage of 20% to 40% of the area that is moderately nervous Degree, while areas with shortages exceeding 40% are highly stressed.) we are at