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FRONTLINE "Poisoned Waters" | Sneak Peek 4 | PBS

Duration: 02:21

In this clip from "Poisoned Waters," correspondent Hedrick Smith examines the impact of large-scale factory farms, a major source of pollution to US waterways. Industrial scale chicken farms generate 1.5 billion pounds of waste annually—more than the human waste from New York, Washington, San Francisco and Atlanta combined.

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Post Date: April 17, 2009