The lack of water is one of the biggest problems in the world. Though water covers 70% of the earth's surface, fresh water covers only 1% of the earth's surface. As we all know, humans can't live without water. But nowadays a large number of countries and areas are short of water.

However, it's a pity that many people still don't pay attention to saving water. They pour dirty water into the rivers, lakes and seas. As a result, water, as a kind of natural resource, is seriously polluted. There is less and less water that can be used by us. If we don't save water, the teardrop of humans will probably be the last drop of water!

All in all, saving water is very important in our life. We should stop polluting the water. In this way, more fresh water can be saved.