1. Center for Industrial Ecology, Yale School of the Environment, Yale University, 380 Edwards Street, New Haven, Connecticut 06511, United States
2. Department of Forest Biomaterials, North Carolina State University, 2820 Faucette Drive, Raleigh, North Carolina 27695, United States
3. Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
4. Chemical and Environmental Engineering, Yale School of Engineering and Applied Science, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06520, United States