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水──人类生存的必需为了子孙后代请您节约用水人们熟知，地球是“三分陆地七分水”，水资源，总量达１４亿立方公里。但其中海洋咸水即高达９７．５％，人类可供生存的淡水仅占２．５％。储量仅为３．５亿立方公里。这其中绝大部分蕴藏在南极冰源和北极冰山中。人类生产...
Water ─ ─ The Need for Human Survival To save water for future generations, it is well known that the Earth is a “three-part land seven-part water” with a total water resources of 1.4 billion cubic kilometers. However, marine saltwater reaches as high as 97.5% and only 2.5% of the fresh water that human beings can survive. Reserves only 350 million cubic kilometers. Most of these are contained in Antarctic ice and Arctic icebergs. Human production ...