尊敬的评委老师，各位朋友：
大家好!
浩瀚美丽的宇宙中，一颗新星的诞生让新的生命有了一个归宿。绿油油的草原，幽静的丛林，湛蓝的海洋……都是如此的美丽，那就是我们居住的地方——地球。
地球居住着的人们，有着不同的种族，不同的样子，不同的交流方式，但唯一相同的就是我们都是地球的儿女，都一脉相连，心心相映。
早在数亿年前，恐龙出现在这块肥沃的土地上，呼吸着新鲜的空气;数万年前，恐龙灭绝了，又出现了新的动植物，轮到它们吸允新鲜的空气了;数千年前，我么的祖先出现了，他们以各种方式来生存，他们用自己的方法来保护美丽的大自然，大自然变得更加生气勃勃。
从远古时代到了经济发展速度极快的现代。人们遗忘了地球母亲对我们的好，肆无忌惮地去伤害她。为了自己的利益，严重地破坏环境，无顾忌地砍伐树木，为此，我们也受到了应有的报应：洪水、沙尘暴……这些灾难席卷而来，无数人类的生命就此丧失了。
大家一定学过“食物链”吧!通过学习“食物链”这一课，我们可以知道，任何东西的生存依靠都是由草开始，比如说在大草原上，老鼠吃草，蛇吃老鼠，老鹰吃蛇……现在我们打个比方，就比如说草原上的草，在一夜之间突然消失，老鼠失去了食物的来源，只好饿死，老鼠饿死了，想要蛇死，也就指日可待了，最后，整个动物世界也灭亡了。
草为什么消失呢?罪魁祸首就是我们人类了。由于人类在不停地制造垃圾，导致之地球上的生物链失去平衡。如果我们随便扔掉一节已废掉的电池，即使在一片土地里的一个小角落里，那个小角落及附近也会长年不长花草，甚至极大可能永远不长花草。
如果我们将一块面包丢在一株花草的附近，它很快就会发霉、烂掉，最后引来一群飞虫，它们在面包上呆一段时间后，很快就会产生新的破坏分子，对它进行破坏。这次，它们的破坏对象就是那株花草了。
既然我们选择了地球，就应该好好地保护它，为我们的生命营造一个美丽的环境。让我们携手努力吧!
A beautiful world
Hello:
everyone!Now I want to talk about a beatiful world!
When I was young,I always dreamed that I lived in a beautiful country. There were many flowers and trees around our city.We counld hear the birds singing and see the children dancing. The streets were clear and the the air was very fresh! How nice it was!But that only was a dream of mine!How I wish that it would be come true! So I think we should do something to protect our environment. Everyone should make a contribution to protect the environment.
Taking care of our environment is very important.Wherever you live,you can do something around your neighbourhood.
Have you ever thrown any litter onto the ground?Have you ever drawn pictures on public walls?Have you ever spat in a public place?Have you ever cut down trees?If your answers are "No",it means that you have already helped protect our environment.
It is our duty to keep our envionment clean and tidy. You might ask yourself,"Have I ever picked up some rubbish and thrown it into a dustbin?Have I ever collected waste paper or bottles for recycling?Have I ever planted any trees or flowers in or near my neighbourhood?"If your answers are"Yes",it means that you have already done something useful to improve the environment.
Now I want to say :Let`s do our best to make our world more beautiful!
for some creatures including human beings; the phenomena of EL Nino and La Nina leave the land with serious flood and drought, and the diseases, caused by pollution, are increasing at an incredible speed... Seeing all these facts, can we still ignore the counterattack of nature? We are not the masters of nature. Facing all the disasters made by ourselves, we, mankind as a whole should realize that we are just a normal member of the big family of nature. Any mistreatment towards nature will meet only with the revenge from her.
By saying so, I do not mean we should give a sudden stop to any development. Because that will result in a threat to the existence of human society. I mean we should treat nature equally, leaving the chance of existence and development to nature as we are obtaining the same thing, and thus we will get the situation of win-win.
I am very pleased to find that now more and more people, from every corner of the planet, have come to realize that harmony with nature is the only way to universal and continuous progress and prosperity. And I think that is why we come here from all over the country to discuss this topic today. I want to end my speech by quoting from Mr. Nixon. "Our destiny offers, not the cup of despair, but the chalice of opportunity." The future is not ours to see of course. However, by seizing firmly the opportunities, by knowing clearly about ourselves, we, human beings, can doubtlessly achieve the real harmony with nature! Thank you.