一篇关于杜绝浪费的英语演讲的开头和结束语

开头可以用
May I have your attention, please?Now I'd like to make a speech.The topic of my speech is about the phenomenon of wasting things.
结尾可以用一些呼吁性的话,比如说
Therefor,we should teach students to save energy and stoping wasting things .That's all. Thank you.
ok.希望对你有帮助.