how to protect the environment ?环境保护问题

good environment can make people feel happy and fit . to improve the environment means to improve our life. we should plant more trees and flowers around us . we shouldn’t cut them down . we should stop factories from pouring waste water into the river and waste gas into the air. whenever we see litter on the ground , we should pick it up  and throw it into dusbins. never spit in public. don’t draw on public walls. it’s our duty to protect the environment.