例说明环境存在的问题1—3方面；2、如何保护好我们的环境，采取怎样的措施，举例1—3方面进行说明，字数80左右。
dear headmasters,teachers,classmates and friends:
i’m very proud that i have chosen to speak to you all today, i’m a bit nervous as i’ve never made a speech before to so many people ,so please forgive me if it shows.
as we all know,the environmemt around us is getting worse and worse .in some places we can’t see fish swimming in the river or trees on the hills. some people even have no clean water to drink. so i think we must do something to protect the environment. .but what can we do? how to protect our environmemt ?for example ,we can go to school on foot or by bike . we can use shopping basskets not plastic bags .when we go shopping and we can use both sides of the paper when we write .in a word ,if everyone pays more attention to our environment ,there will be less pollution and our life will be better.