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| Posted: August 4, 2008 |
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Atmospheric chemist Kenneth Rahn regularly travels to China to consult with scientists there about the country's air pollution problem. Rahn took your questions about pollution in Beijing during the run-up to the Olympic Games. |
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| MJ of Chicago, Ill. asks |
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| Are pollution problems less serious in other Chinese cities, especially Shanghai and Nanjing? |
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| Kenneth Rahn responds: |
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Not necessarily, just different. Beijing has much more particulate matter than those places, but Shanghai has a lot of emissions from automobiles. Nanjing is smaller and relatively cleaner. Guangzhou is part of the Pearl River Delta, and receives a lot of pollution from nearby Hong Kong, Shenzhen, etc., in the summer, but gives back to them in the winter. Other cities in China are also strongly polluted. Lanzhou, in the northwest, comes to mind. Xi'an is bad, as is its neighbor Taiyuan. I could list more, but this gives the general idea.
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