A few years ago, hog farmers throughout the Midwest noticed foam building on top of their manure pits. Soon after, barns began exploding, killing thousands of hogs while farmers lost millions of dollars.
A team of University of Minnesota researchers is looking to find a fix for the foam that is plaguing hog farms.
The foam traps gases like methane and when a spark ignites it causes an explosion. About a half dozen barns in the Midwest have exploded since the foam was discovered in 2009.