Advocates of biofuel technology, which includes ethanol, butanol and biodiesel, say energy derived from biomass is cleaner than gasoline. Could biomass-derived fuels serve as a major component of the U.S. energy economy?
Dan Kammen, co-director, Berkeley Institute of the Environment; professor, Energy And Resources Group, University of California, Berkeley
Mitch Mandich, CEO of Range Fuels
Jim McMillan , manager, Biorefining Process R&D Group at the National Renewable Energy Laboratory