Last summer, there was a terrible flood in the Yangtze Riv-er. The flood was one of the most serious in history. On TV, you can see waters roaring and rushing down the river fiercely. You can also see the peasants' eyes filled with tears because they got nothing after a whole year's hard work, as a result of the flood. China is now afflicted by various natural disasters. And it has become a popular topic for people. What I want to say is if there are such natural disasters, it is caused by human beings, not the nature itself. Here, I just want to mention three things. First, people are destroying the forests. Tens of thousands of trees are cut down. As all of us know, trees are so important to us that we can't live without them. Trees provide us with food with-out which we can't live. Trees clean the air, without which we can't live. What's more, trees keep the sands from being washed away. The flood last summer has a lot to do with the destroying of forests. Second, we are causing serious pollution. Poisonous chemicals are let out into the air {polluted water is pumped into rivers and seas; a great amount of rubbish is produced and dumped every day. Don't you think it's too high a price we pay for the dubious privilege of living on such an over-populated and over-industrial-ized planet? Third, we are killing animals. One species of animal disasters every day on average. One day, I was walking in a street when I saw a man selling bear paws. I immediately went up and told him it was illegal. His reply surprised me greatly. He said, "It's ille-gal?" From then on, I knew it's very important to tell people not to kill precious animals. If we keep on killing animals, the balance of nature is sure to be broken. In a word, we mankind have been so greedy. The natural dis-asters are only the nature's punishment. It's high time for us to wake up and stop destroying our planet. It's high time that we protected the nature and built up a new world. This is what we must learn after so many natural disasters in China.
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