What can students do to protect the environment?

It hard to say . But i think we should let students do concern things to protect the environment -like :clean garbages in the public park. Recycle these used paper ,iron ,plastic bag and use clothe bag when go shopping;save water ,use water for several times to do different kinds of things like :wash face ,water flowers... Then we have to educate students to develop the good habit to protect environment. I believe we can make the earth a better place to live in. Thanks.