1 Biomass Powered Corn-Ethanol: Influence on Life-Cycle GHG Emissions and BESS Model Methods Adam J. Liska 1 *, Haishun Yang 1 , Daniel T. Walters 1 , Virgil Bremer 2 , Galen Erickson 2 , Terry Klopfenstein 2 , Rick Koelsch 3 , Kenneth G. Cassman 1,4 Department of Agronomy and Horticulture 1 , Department of Animal Science 2 , Department of Biological System Engineering 3 , Nebraska Center for Energy Sciences Research 4 , University of Nebraska-Lincoln *aliska2@unl.edu, www.bess.unl.edu Profitable Use of Biomass at Ethanol Plants; Feb. 19-21, 2008