Polluted water is one of the biggest problems in the world水污染是世界上最大的难题之一we must protect the water，protect our 我们要保护水资源，保护我们的家园。Let's do something meaningful to bring pollution under 让我们做一些有意义的事来控制污染。Pollution is becoming more and more serious now。现在污染正在进一步恶化当中。As a student，we have to treasure every drop of water，never throw waste derectly into 作为学生，我们应该珍惜每一滴水，永远不要想河里扔垃圾。
Over the world water resource is being polluted and over- In China， water is extremely scarce due to a big We have only one quarter of the world average water availability per And to make matters worse， the water distribution is quite uneven throughout China and across the Despite the obvious inadequacy of water supply， in many area water is used inefficiently and polluted， causing problems for human
