Poisoned Places

Published — November 7, 2011 Updated — May 19, 2014 at 12:19 pm ET

VIDEO: Toxics in the air, worry on the ground


Two decades ago Congress strengthened the Clean Air Act in an attempt to limit emissions of some of the most hazardous chemicals. But an investigation by the Center for Public Integrity’s iWatch News and NPR has found that the toxic pollution persists in hundreds of communities, including two cities in Pennsylvania. This video profiles those cities.

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