Air pollution in China

 How does air pollution affects Beijing?

http://1.bp.blogspot.com/_5BYXozpwtU4/TQIznTInCCI/AAAAAAAAABk/wvH73C8TBP4/s1600/china_map_regions.gif


With reference to the map:
What are the areas which pollutant level are high?
Why do you think the pollutant level is high in these areas?

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