Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels

John L. Field, Tom L. Richard, Erica A. H. Smithwick, Hao Cai, Mark S. Laser, David S. LeBauer, Stephen P. Longh, Keith Paustiana, Zhangcai Qine, John J. Sheehann, Pete Smith, Michael Q. Wang, Lee R. Lynd