Many people believe that the world’s 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.
許多人認(rèn)為,世界上的淡水供應(yīng)的永遠(yuǎn)不會用完。他們認(rèn)為淡水來自各種來源,它總是足夠使用了。這種觀點(diǎn)導(dǎo)致了一個(gè)令人震驚的浪費(fèi)水。
事實(shí)上,地球上淡水短缺。此外,世界人口的快速增長,對水的.需求不斷增加,工業(yè)和環(huán)境的嚴(yán)重污染,世界正面臨耗盡淡水的工頭。實(shí)際上,在一些大城市,淡水不能滿足日常需求。
因此,尋找新的方法來節(jié)約用水是一個(gè)緊迫的任務(wù)。首先,我們應(yīng)該通過嚴(yán)格的法律來控制任何浪費(fèi)水。第二,科學(xué)家必須加倍努力凈化海水,并試圖找到替代品減少淡水的使用。
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