Mother Nature is an exquisite and complex life-system. Its charm appears in the trees, stream, soil, insects, moss and fungus, all the things on the earth in different shapes, which are interdependent. When you get close to nature, please remember, each tree, stone and species of animals here has lived harmoniously for hundreds, thousands or even millions of years. When we pass away, they will continue to live. They are the real masters, while we are just the passer-by. However, the conduct we unconsciously do, such as picking, lumbering, tramping and abusing can probably destroy the balance of their life. Therefore, we must reduce our bad influence as much as possible. While you are enjoying the nature, do not forget please, the beauty of the lives also needs to be concerned with and to be protected.Each life on the earth has a long and touching evolutionary story. From the origin, the lives of the human being are equal to those of others; they both are the composing parts of Mother Nature. Nevertheless, for some inexplicable reasons, the human becomes the spirits of all creatures. Of course, it is the result of the evolution, but still we should be grateful to all our companions in nature for the opportunity they offer.In spite of this, humans cannot live without earth. They live on the earth, drink the sweet water, and enjoy the sunshine, the air, the sky, the fruit; the grains utilize the energy and so on. In a word, the human being cannot live without nature, and Mother Nature makes us grow stronger.I do not like the word Pet, but preferring the word Animal instead. I have been loving animal since I was just a little boy. When thinking of the Pet Fashion, I always feel much annoyed. For the animals will be given a shackle and lose their liberty if they become someones pets. Their natural attribution can be deprived, too.Up to now, relying on their scientific power, the human have opened up too much and over developed nature, in order to fill up their growing appetites of wealth. They destroy the balance of nature, however, they dont realize, their own development and existence will be threatened. Therefore, our sights should be focused on nature and we should try to develop the concept of keeping human and nature in unity.We should lay emphasis on our education with consider cultural and natural emotion. To use the vivid example to wake up the conscience in peoples hearts.To love nature is to love our mankind. As the new generation who enter the new century, we should make efforts to love and respect nature, to treat it well and protect it. At last, we have the night to enjoy it.My dear Teachers，fellow students and friends： Good afternoonAs we all know, the earth is a planet almost covered by water，and it is water made every thing on the earth livelyWater is also one of the important part of our environmentThough，is there really so much water for us to clean，to produce many things，to play with? how much water are there on the earth then?Most of the water is in the oceans or locked away as iceThe largest volumes of fresh water are stored underground as groundwater，imagine there is only one barrel of water in the world，then there is only a spoon of it on the land，and the water we can use is only a drop of itNow I have to remind all of you here that the single drop of water is never as Clean as before，it has been polluted severely by our human beingsThere is a very beautiful river in ParisIt is the Seine，it runs across the City，people drink coffee, chat on the bank in the day，at night，they enjoy the beautiful scenery in the boat，songs from the river fly into the Sky made the river more attractive, the Seine is a famous symbol of France；on the west coast of pacific ocean there lies the modern City Shanghai，another river which used to be a very important transportation route runs through the center of the city，people respected and regard it asmotherIt is thesuzhou river，but l believe that few of you would sit beside it，people will be scattered by the terrible smell of water when walk byI have to say it is extremely dirty! And we all know that a lot of beautiful rivers in the world also are Sharing the same fate with suzhou river Who is the devil? I cant help askingMany human activities and their by-products have the potential to pollute water. Please have a look along the banks of the river, large and small industrial enterprises discharge dirtywater, tons of garbage were thrown into the river, the water contained so much that it cant clean itself. Compared with the dramatic development in many sides of Shanghai, the suzhou river has become a black point of the appearance of city.Fortunately, the government has control the situation now, we are happy to see some parts of the river has become clean again, and we even can find fish sometime.The unique earth is the only planet full of lives, the water is just like the blood in the active body, protecting water is saving ourselves.