1. Energy & Biosciences Institute, University of California, Berkeley, Berkeley, California 94720, United States
2. Life-Cycle, Economics, and Agronomy Division, Joint BioEnergy Institute, Emeryville, California 94608, United States
3. Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States