World's most polluted cities

POSTED: 09:23 AM PST Jan 14, 2013    UPDATED: 06:22 AM PDT Mar 29, 2013 

Take a look at some of the world's most polluted cities, as ranked and compiled by Time, the Blacksmith Institute and ABC Environment.

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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