Representatives of the biomass energy industry have gathered in St. Louis this week.
They're here to discuss technologies for turning everything from crop residues to municipal trash into liquid fuels, heat, and electricity.
Tim Portz is the program director for BBI international, the company organizing the International Biomass Conference & Expo.
He says it's not going to be easy for the biomass industry to gain a foothold in the marketplace of already established U.S. energy producers.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.