Access to sufficient amounts of clean water is increasingly recognized as the critical resource problem in the 21st century. The World Commission on Water estimates that the world's use of water has increased six-fold over the last 100 years, even though the population has only tripled. It predicts that, under current levels of demand, water usage will rise by 50 percent over the next 30 years. Three billion people will live in countries that will...
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详细
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2003/03/01
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工作文件（编号系列）
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26323
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1
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1
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2010/07/01
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Disclosed
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Water conservation : urban utilities
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water