Water is very important to the human beings.But now many rivers and lakes are polluted. And what shall we do ? We can do like this: First we must prevent the factory from pouring waste water into the river Second we should stop people from throwing litter into the river.Many kinds of litter may pollute the environment. Finally we can tell the visitors how important the water is. After doing these things,I think water will become cleaner sooner or later.水是對人類非常重要.但是現在許多河流和湖泊受到汙染.而我們該怎麼辦?我們可以這樣做：首先,我們必須防止工廠將汙水倒入河流.其次,我們應該阻止人們把垃圾扔進河流.各種垃圾會汙染環境.最後,我們可以告訴參觀者,水是多麼重要.做了這些事情後,我認為水將遲早變得更清潔.
Water is very important to the human beings.But now many rivers and lakes are polluted. And what shall we do ? We can do like this: First we must prevent the factory from pouring waste water into the river Second we should stop people from throwing litter into the river.Many kinds of litter may pollute the environment. Finally we can tell the visitors how important the water is. After doing these things,I think water will become cleaner sooner or later.水是對人類非常重要.但是現在許多河流和湖泊受到汙染.而我們該怎麼辦?我們可以這樣做：首先,我們必須防止工廠將汙水倒入河流.其次,我們應該阻止人們把垃圾扔進河流.各種垃圾會汙染環境.最後,我們可以告訴參觀者,水是多麼重要.做了這些事情後,我認為水將遲早變得更清潔.