Minnesota researchers are trying to figure out the source of a greyish-brown foam forming on top of manure pits that’s causing hog farms in the Midwest to unexpectedly explode (via Gawker).
Kali Dingman of The Minnesota Daily reports that farmers first noticed the issue in 2009 when incidents of pit foaming resulted in barn explosions and killed thousands of pigs.
Categories: Americas, Animals, Environment, Nature & Wild Life, Research