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| when Chinese people find out that someone comes from London, they often say, "London is a foggy city, isn't it?" British people who visit China often 1 say that London is not a foggy city at all!But if London is not foggy. 2 bo so many people in China think it is?In tact, London used to be a foggy city, 3 in isn't any more. In London peole of this it in pollution (污染) came from factories, but a lot of it came from coal (煤) because people used it in their houses 4 warm duing the winter.By the 1950s, Long-don's air pollution had became so 5 that the govemment (政府) decided to do something to clean up the air. A new rule was made. It said that 6 was not allowed to bum (燃烧) cosl in any British city. Just a few years 7 , the air became much cleaner. Now many Chinese cities meet the same kind of 8 with air pollution that London met forty or fitty years ago. However.this problem is more difficult for Chinese cities to 9 . First, more of the pollution comes from big fsctoies than from coal that pcople use in their houses. If these fac-lories are suddenly closed, lots of people 10 their jobs.Second, cleaner fuels(燃料)are quite expensive. However, the air in many cities is 11 slowly becoming cleaner,because the govem-ment and ordinary people are trying to make pollution 12 . As a result,the air in Beijing is get-ting cleaner and cleaner. | ||||
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