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World's most polluted cities

Published On: Jan 14 2013 11:23:54 AM CST   Updated On: Dec 06 2013 09:31:40 AM CST

Severe pollution is once again choking Shanghai and other cities in China, disrupting hundreds of flights and forcing schools to close. China is home to some of the world's most polluted cities -- take a look at some of the others.

Most Polluted - Dzerzhinsk
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Dzerzhinsk, Russia -- One of the Soviet Union's major sites for chemical weapons production, the Guinness Book of World Records named Dzerzhinsk the most chemically polluted city on Earth, and in 2003 its death rate exceeded its birth rate by 260 percent.

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