The most important question in the world is pollution, but we know water, like air is very important to living things because all animals and plants need water. We, like fish can't live without water. We need it to drink, cook, and clean ourselves. We need clean fresh water, but we are polluting the lakes and rivers. Our drinking water is becoming less and less. If we continue to do things like this, we shall destroy ourselves.

　　I think we should follow the rules. Don't throw food away. We try to make a good habit. I know it's our duty to save water. So we should save water and protect eh environment.

　　Now water pollution is the most serious problem. We can't live without water. Water is life. So I think we should do something go save and protect water.

　　One: turn off the shower while you are washing your hair.

　　Two: we can use the water that has washed vegetables to water plants

　　Three: When you see someone is wasting water, come over and stop him.

　　Four: Don't pour the rubbish into the river.

　　Though these are small things to protect water, I still thin they're important.