Environmental Science and Technology has a special feature on the water demands of expanded biofuels production. This is another one of those elephants in the room (possibly the biggest of them all) that industry and politicians refuse to see.
The report focuses not only on water use, but also on water quality.
It also makes the debate tangible by asking, "Are We Ready for Fifty Gallons of Water per Mile Driven?".
http://cas.okstate.edu/debo/blogs/htsrv/trackback.php?tb_id=362
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This blog is devoted to the promotion, development, and understanding of Wildfuels and Low-Input, High-Diversity systems for biofuels. Frequently used acronyms: HILD - High-Input, Low-Diversity systems. These include corn (maize) as well as improved switchgrass, hybrid poplar, miscanthus, rapeseed, and many others. HILD systems require high energy and agrichemical inputs. LIHD - Low-Input, High-Diversity systems. This term was coined by the ecologist David Tilman and coauthors. These include natural and seminatural grasslands, restored prairie, spontaneous succession, and other grasslands. LIHD systems require few, if any, agrichemical inputs. This list is moderated by Michael W. Palmer, Vegetation Scientist, Department of Botany, Oklahoma State University. email: mike.palmer@okstate.edu