We have only one world_400字

　　It’s our duty to protect the environment. I think we should keep our schools and cities clean and tidy.

　　Here are some of my views：

　　Don’t spit in public and throw rubbish everywhere .And we should plant trees and flowers around the city. It’s important to recycle paper and water. Don’t [復習必備 | 海量免費學習視頻資源盡在“學而思輕課APP”>>>點擊了解]forget to turn off the lights when we leave the room. We had better walk or ride bikes to school to keep our streets clean. We must do our best to make our world more and more beautiful in the future. Do you think so ？