Many people believe that the worlds supply of fresh water will never be used up. They think that fresh water comes from such a variety of sources that it is always sufficient for use. Such an opinion leads to a shocking waste of water.
As a matter of fact, the earth is short of fresh water. Furthermore, with the rapid growth of the world population, the rising demand for water by industry, and the serious pollution of our surroundings, the world is facing the ganger of running out of fresh water. Actually, in some big cities, fresh water can not meet the daily needs.
Therefore, to find new ways to save water is an urgent task. First, we should pass strict laws to control any waste of water. Second, scientists must work even harder to purify sea water, and try to find substitute to reduce the use of fresh water.
许多人认为,世界上的淡水供应的永远不会用完。他们认为淡水来自各种来源,它总是足够使用了。这种观点导致了一个令人震惊的浪费水。
事实上,地球上淡水短缺。此外,世界人口的快速增长,对水的需求不断增加,工业和环境的严重污染,世界正面临耗尽淡水的工头。实际上,在一些大城市,淡水不能满足日常需求。
因此,寻找新的方法来节约用水是一个紧迫的任务。首先,我们应该通过严格的法律来控制任何浪费水。第二,科学家必须加倍努力净化海水,并试图找到替代品减少淡水的使用。