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Chicken and Hog Farms Measured for Air Pollution

NPR | By Greg Allen
Published March 7, 2006 at 8:33 AM MST
Hog farmer Max Schmidt stands in front of sows being held in an outside pen at his farm in Elma, Iowa.
Greg Allen, NPR
Hog farmer Max Schmidt stands in front of sows being held in an outside pen at his farm in Elma, Iowa.

Copyright 2006 NPR
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Greg Allen
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