Chicken and Hog Farms Measured for Air Pollution

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Hog farmer Max Schmidt. Credit: Greg Allen, NPR. i

Hog farmer Max Schmidt stands in front of sows being held in an outside pen at his farm in Elma, Iowa. Greg Allen, NPR hide caption

itoggle caption Greg Allen, NPR
Hog farmer Max Schmidt. Credit: Greg Allen, NPR.

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 farms are known for their odor. But so far, no one has paid much attention to whether these smells actually pollute the air. Now, the Environmental Protection Agency is testing chicken and hog farms for gases and particles that can make air harmful to breathe.

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