Air pollution in China
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh77512XV_xbF4tcNF0G-75aSLa5Sasn7b_R3_yKwVIbteflcTYCp5RCpOdGLNPIL7X5h3IslezrGDUqg-Q0EjCUcxZ1X_iidC3TS4si9FS098SbB7JkxhGxCGAaJctdelZJGaSz8DLYmg/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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