保护水资源的建议 英文小短句

Water is very important to the human beings.
And what shall we do?
We can do like these things:
First we must protect the factory form 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 clearer sooner or later.