From the Proceedings of the National Academies of Science:
http://www.pnas.org/cgi/reprint/103/30/11206
Before you buy a share of a corn based ethanol production facility you should read this six page paper. And from BusinessWeek: "Ethanol's Growing List of Enemies"
http://www.businessweek.com/bwdaily/dnflash/content/mar2007/db20070316_016207.htm?chan=rss_topStories_ssi_5
