Five years ago, ethanol was seen as the next big thing to wean the U.S. off foreign oil. Then some studies on the corn-based fuel cast doubt on its environmental benefits, and auto companies turned their attention to hybrids and electric cars. The hype died off, but the ethanol industry is alive and well, driving a big change in America's corn consumption.
Rising up out of the corn fields outside Lake Odessa, Mich., is the ethanol refinery for Carbon Green Bioenergy. The company's CEO, Mitch Miller, says a lot of refineries were popping up when this one was built in 2006.