Mysterious Foam Challenges Farmers And Scientists04:18
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Foam in manure pits has been blamed for flash fires and explosions at hog barns in the upper Midwest. (Amy Mayer/Harvest Public Media)
Foam in manure pits has been blamed for flash fires and explosions at hog barns in the upper Midwest. (Amy Mayer/Harvest Public Media)

Hog farmers in the Midwest are on edge about an unusual problem: foam sometimes forms on the manure piles, and apparently causes flash fires and explosions.

Scientists are trying to figure out the cause.

From the Here & Now Contributors Network, Amy Mayer of Harvest Public Media reports.

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This segment aired on September 18, 2013.

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