Here's Pimentel's paper:
Ethanol Production Using Corn, Switchgrass, and Wood; Biodiesel
Production Using Soybean and Sunflower
David Pimentel and Tad W. Patzek
Natural Resources Research, Vol. 14, No. 1, March 2005 (C 2005)
http://journeytoforever.org/biofuel_library/Pimentel-Tadzek.pdf
News release from Cornell:
http://www.news.cornell.edu/stories/July05/ethanol.toocostly.ssl.html
Biomass for biofuel isn't worth it
FYI:
David Pimentel
Email: [EMAIL PROTECTED]
See:
http://journeytoforever.org/ethanol_energy.html
Is ethanol energy-efficient?
Scroll down to "Ethanol under fire" for more on Pimentel.
Best wishes
Keith
Thanks to a post at TDIclub, I discovered that Pimentel has released
yet another report on ethanol. Looking at the dates below, he's a
month ahead of schedule this year.
http://www.news.cornell.edu/stories/July05/ethanol.toocostly.ssl.html
http://www.news.cornell.edu/Chronicle/03/8.14.03/Pimentel-ethanol.html
http://www.news.cornell.edu/Chronicle/01/8.23.01/Pimentel-ethanol.html
I can't speak to this newest report, but as long time readers of
this list already know, Pimental's work has been repeatedly
critiqued, and one of the main compliants it that he uses out of
date numbers for yield and conversion efficiency. Here's a few links:
http://www.mda.state.mn.us/ethanol/balance.html
http://www.usda.gov/oce/oepnu/aer-814.pdf
http://journeytoforever.org/ethanol_rooster.html
http://www.ncga.com/public_policy/PDF/03_28_05ArgonneNatlLabEthanolStudy.pdf
http://www.ethanol-gec.org/corn_eth.htm
All that having been said, Pimental is right that soy and corn alone
cannot replace our petroleum addiction
jh
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