读写填空 #37Fresh Water Supply
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Everybody needs fresh water. water, people, animals and plants cannot live. Although a few plants and animals can make do with saltwater, all humans need a constant supply of fresh water if they are to stay and healthy. Of the total supply of water on the Earth, only about 3 percent of it is fresh, and most of that is stored as ice and snow at the poles, or is so under the surface of the Earth that we cannot get to it. Despite so much of the water being out of reach, we still have a million cubic miles of it that we use. That's about 4,300,000 cubic kilometers of fresh water to share out between most of the plants, animals and people on the planet.
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题号#37