the world is not only hungry,but also is short of thewater.this may sound strange for 70% of the surfaceof the use is covered by water.but 97% of this is seawater or soft water.man can only use the other 3%fresh water that country rivers,lakes and from otherground and we can't ever use all of that becausesome of them are the iceberges and glaciers. what'sworse, some of the fresh water has been polluted.ourneed of water is increasing rapidly day by day. so we should take the measures to solve theproblem.
全世界不仅受到饥饿的挑战，更加缺水。地球表面的70%都被水所覆盖，这似乎让我们感到非常奇怪。但是，在这些水资源中有97%是海水，或是软水。人们只能够利用那余下的3%，这些水来自河流、湖泊、地表，我们无法利用所有的水资源，因为有些是冰川和冰山。更严重的是，许多淡水资源得到了污染。而我们每天对水资源的需求还在增加。所以，我们需要采取措施来解决这一问题。
