请各位亲帮忙写一篇英语作文 以保护环境为题 要求：1为什么要保护环

Bad environment can do great harm to man and animals life,So we should protect the environment which we live in.we should do somthing to protect the environment.firstly,we should stop factories pouring waste water in to rivers,lakes and fields,and reduce emissions from cars, factories and othersources. secondly,we shouldnt throw rubish everywhere.thirdly,we should save enery and plant more tree.all these we must try our best to protect our environment.