Water
Water is important to us. We can't live without water. But in our Earth, there are one-fourth water is fresh water. Therefore, we must save water. We can do in our daily lives. Don't take a bath, you can take a shower intead of it. If you find a dropping tap, you must fix it in time. Remember that water is necessary for us. You mustn't waste water. So let's try our best to make our Earth more and more beautiful.
参考资料:egregia cum laude from pre-school DT