“We’re definitely falling behind,” says Gary Radloff, a researcher with the Wisconsin Energy Institute at the University of Wisconsin-Madison. “It’s pretty remarkable and measurable.”
Since 2001, manure digesters have been popping up across the state. Wisconsin now has 34, the most in the nation, with two more scheduled to begin operating by 2015. In all these digesters, bacteria eat biomass like manure, food scraps or whey and emit energy in the form of methane gas.