Water is so important in our daily life.We cannot live without water.We use water to wash,to cook and to plant trees and crops as well.As we all know,we are short of water now.Some people even have no drinking water in some places of the world.Therefore,we must try our best to protect our water system.Meanwhile,we must save water and fully use water.Personally I think,we should learn how to recycle the waste water. That will be very helpful in saving water.I wish that everybody can do something to help save water. Otherwise,the last drop of water on the earth will be your tears.