To take Dr. Humphrey up on his challenge to post more full cost accounting work, here's a very interesting link to a page that describes a number of different biofuel LCAs recently published in the peer-reviewed literature. http://www.greencarcongress.com/lifecycle_analysis/ -- Jason M. Evans, Ph.D. Postdoctoral Researcher Department of Wildlife Ecology and Conservation University of Florida Newin-Ziegler 319 (352) 846-0148 - office (352) 328-1199 - cell