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4. Air pollution and water pollution are the two causes of the problem that many parts of the world have become deserts. F 5. Chemicals in the smoke from power stations can travel hundreds of miles in the wind before falling down to the ground in the rain. F 6. After a bad accident at a nuclear power station, 50% of the trees in Germany were damaged. F 7. The writer to explain how water is polluted uses the examples of the accidents in both India and Russian. F 8. Once oceans are polluted, they are not able to clean themselves. F Step 4 Intensive Reading Read the passages again for some detailed information 1. To say something about the damage that is caused to the world by pollution, using the information from the text. Try to present possible ways to help solve the problems. Phenomena Causes Suggestions E A R T H The area of desert is growing every year. Cattle eat grass. Limit the number of the cattle. (责任编辑：admin) |