地球实际上是个“水球”,因为地球表面“水多地少”。据测定,地球表面水占71％,陆地占29％。地球上的水虽然很多,但是淡水却非常稀少。 大陆上所有河流、湖泊、冰川和地下水的淡水资源储量为35000万亿立方米,而且绝大部分淡水资源集中在南极和格陵兰地区的冰川和雪盖上,其水量为24000万亿立方米,占全球淡水资源的70％。所以有人建议,把 The earth is actually a “water polo,” because the surface of the earth is “juicy and less.” It has been determined that 71% of the earth’s surface water and 29% of the land. Although the earth has a lot of water, fresh water is scarce. Freshwater reserves of all rivers, lakes, glaciers and groundwater in the continent amount to 35,000 trillion cubic meters and most of the freshwater resources are concentrated in glaciers and snow cover in the Antarctic and Greenland regions, with 24,000 trillion cubic meters of water, accounting for 70% of the world’s freshwater resources. So someone suggested that put