World's most polluted cities

POSTED: 12:23 PM Jan 14 2013   UPDATED: 12:55 AM Dec 08 2013

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.

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

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