PGR News from the Pacific

Posted 8:46 PM by Luigi

Ethanol and biodiesel from crops not worth the energy?

There's been a lot in the news lately about bio-fuels. But do they stand up to the hype. Maybe not, according to a recent study.

ITHACA, N.Y. -- Turning plants such as corn, soybeans and sunflowers into fuel uses much more energy than the resulting ethanol or biodiesel generates, according to a new Cornell University and University of California-Berkeley study.

"There is just no energy benefit to using plant biomass for liquid fuel," says David Pimentel, professor of ecology and agriculture at Cornell. "These strategies are not sustainable."
Pimentel and Tad W. Patzek, professor of civil and environmental engineering at Berkeley, conducted a detailed analysis of the energy input-yield ratios of producing ethanol from corn, switch grass and wood biomass as well as for producing biodiesel from soybean and sunflower plants. Their report is published in Natural Resources Research (Vol. 14:1, 65-76).
In terms of energy output compared with energy input for ethanol production, the study found that:

corn requires 29 percent more fossil energy than the fuel produced;
switch grass requires 45 percent more fossil energy than the fuel produced; and
wood biomass requires 57 percent more fossil energy than the fuel produced.

In terms of energy output compared with the energy input for biodiesel production, the study found that:

soybean plants requires 27 percent more fossil energy than the fuel produced, and
sunflower plants requires 118 percent more fossil energy than the fuel produced.

In assessing inputs, the researchers considered such factors as the energy used in producing the crop (including production of pesticides and fertilizer, running farm machinery and irrigating, grinding and transporting the crop) and in fermenting/distilling the ethanol from the water mix. Although additional costs are incurred, such as federal and state subsidies that are passed on to consumers and the costs associated with environmental pollution or degradation, these figures were not included in the analysis.

"The United State desperately needs a liquid fuel replacement for oil in the near future," says Pimentel, "but producing ethanol or biodiesel from plant biomass is going down the wrong road, because you use more energy to produce these fuels than you get out from the combustion of these products."

Although Pimentel advocates the use of burning biomass to produce thermal energy (to heat homes, for example), he deplores the use of biomass for liquid fuel. "The government spends more than $3 billion a year to subsidize ethanol production when it does not provide a net energy balance or gain, is not a renewable energy source or an economical fuel. Further, its production and use contribute to air, water and soil pollution and global warming," Pimentel says. He points out that the vast majority of the subsidies do not go to farmers but to large ethanol-producing corporations.

"Ethanol production in the United States does not benefit the nation's energy security, its agriculture, economy or the environment," says Pimentel. "Ethanol production requires large fossil energy input, and therefore, it is contributing to oil and natural gas imports and U.S. deficits." He says the country should instead focus its efforts on producing electrical energy from photovoltaic cells, wind power and burning biomass and producing fuel from hydrogen conversion.



	A blog maintained by Tevita Kete, PGR Officer Secretariat of the Pacific Community (SPC), Suva, Fiji Islands
This weblog documents the activities of Pacific Agricultural Genetic Resources Network (PAPGREN), along with other information on plant genetic resources (PGR) in the Pacific. The myriad varieties found within cultivated plants are fundamental to the present and future productivity of agriculture. PAPGREN, which is coordinated by the Land Resources Division of the Secretariat of the Pacific Community (SPC), helps Pacific countries and territories to conserve their crop genetic diversity sustainably, with technical assistance from the Bioversity International (BI) and support from NZAID and ACIAR. SPC also hosts the Centre of Pacific Crops and Trees (CEPaCT). The CEPaCT maintains regional in vitro collections of crops important to the Pacific and carries out research on tissue culture technology. The CEPaCT Adviser is Dr Mary Taylor (MaryT@spc.int), the CEPaCT Curator is Ms Valerie Tuia (ValerieT@spc.int). PAPGREN coordination and support IPGRI ACIAR NZAID CTA SPC PAPGREN CEPaCT Click on the thumbnail to see a map of the locations of Pacific genebanks. Click here to download a regional directory of genebanks in the Pacific, including information on their location, contact details and holdings. PAPGREN partners Mr William Wigmore Director of Research Ministry of Agriculture Department of Resources & Development P.O. Box 96 Rarotonga Cook Islands Tel: (682) 28711-29720 Fax: (682) 21881 Email: cimoa@oyster.net.ck Mr Adelino S. Lorens Chief Agriculture Pohnpei Office of Economic Affairs P.O. Box 1028 Kolonia Pohnpei 96941 Federated States of Micronesia Tel: (691) 3202400 Fax: (691) 3202127 Email: pniagriculture@mail.fm Dr Lois Englberger Island Food Community of Pohnpei Research Advisor P.O. Box 2299 Kolonia Pohnpei 96941 Federated States of Micronesia Email: nutrition@mail.fm Mr Apisai Ucuboi Director of Research Ministry of Agriculture, Fisheries & Forest Koronivia Research Station P.O. Box 77 Nausori Fiji Islands Tel: (679) 3477044 Fax: (679) 3477546-400262 Email: apisainu@yahoo.com Dr Maurice Wong Service du Developpement Rural B.P. 100 Papeete Tahiti 98713 French Polynesia Tel: (689) 42 81 44 Fax: (689) 42 08 31 Email: maurice.wong@rural.gov.pf Mr Tianeti Beenna Ioane Head, Research Section Division of Agriculture Ministry of Environment, Lands and Agricultural Development P.O. Box 267 Tarawa Kiribati Tel: (686) 28096-28108-28080 Fax: (686) 28121 Email : agriculture@tskl.net.ki; Beenna_ti@yahoo.com Mr Frederick Muller Secretary Ministry of Resources & Development P.O. Box 1727 Majuro 96960 Marshall Islands Tel: (692) 6253206 Fax: (692) 6257471 Email: rndsec@ntamar.net Mr Herman Francisco Director Bureau of Agriculture Ministry of Resources & Development P.O. Box 460 Koror 96940 Palau Tel: (680) 4881517 Fax: (680) 4881725 Email: bnrd@pnccwg.palaunet.com Ms Rosa Kambuou Principal Scientist PGR NARI Dry Lowlands Programme Laloki Agricultural Research Station P.O. Box 1828 Boroko National Capital District Papua New Guinea Tel: (675) 3235511 Fax: (675) 3234733 Email: kambuou@global.net.pg Ms Laisene Samuelu Principal Crop Development Officer Crops Division Ministry of Agriculture, Forests, Fisheries & Meteorology P.O. Box 1874 Apia Samoa Tel: (685) 23416-20605 Fax: (685) 20607-23996 Email: lsamuelu@lesamoa.net Mr Jimi Saelea Director of Research Department of Agriculture and Livestock P.O. Box G13 Honiara Guadalcanal Solomon Islands Tel: (677) 27987 Mr Tony Jansen Planting Materials Network Kastom Gaden Association Burns Creek, Honiara P.O. Box 742 Honiara Solomon Islands Tel: (677) 39551 Email: kastomgaden@solomon.com.sb Mr Finao Pole Head of Research Ministry of Agriculture & Forests P.O. Box 14 Nuku'alofa Tonga Tel: (676) 23038 Fax: (676) 24271 Email: thaangana@hotmail.com Mr Frazer Bule Lehi Head of Research Department of Agriculture & Rural Development Private Mail Bag 040 Port Vila Vanuatu Tel: (678) 22525 Fax: (678) 25265 Email: flehi@hotmail.com Other links Other CROP agencies Forum Secretariat University of the South Pacific SPREP Pacific biodiversity Biodiversity hotspots Breadfruit Institute Hawaiian native plants Intellectual property rights Nature Conservancy PBIF PestNet SIDS WWF South Pacific Program Other Pacific organizations Foundation of the Peoples of the South Pacific Micronesian Seminar Te Puna web directory Pacific news Cafe Pacific CocoNET Wireless Island Directory Pacific Islands News Pacific Islands Report Pacific Islands Travel Pacific Time South Pacific travel Time Pacific Interested in GIS? DIVA-GIS	Sunday, July 10, 2005 Posted 8:46 PM by Luigi Ethanol and biodiesel from crops not worth the energy? There's been a lot in the news lately about bio-fuels. But do they stand up to the hype. Maybe not, according to a recent study. ITHACA, N.Y. -- Turning plants such as corn, soybeans and sunflowers into fuel uses much more energy than the resulting ethanol or biodiesel generates, according to a new Cornell University and University of California-Berkeley study. "There is just no energy benefit to using plant biomass for liquid fuel," says David Pimentel, professor of ecology and agriculture at Cornell. "These strategies are not sustainable." Pimentel and Tad W. Patzek, professor of civil and environmental engineering at Berkeley, conducted a detailed analysis of the energy input-yield ratios of producing ethanol from corn, switch grass and wood biomass as well as for producing biodiesel from soybean and sunflower plants. Their report is published in Natural Resources Research (Vol. 14:1, 65-76). In terms of energy output compared with energy input for ethanol production, the study found that: corn requires 29 percent more fossil energy than the fuel produced; switch grass requires 45 percent more fossil energy than the fuel produced; and wood biomass requires 57 percent more fossil energy than the fuel produced. In terms of energy output compared with the energy input for biodiesel production, the study found that: soybean plants requires 27 percent more fossil energy than the fuel produced, and sunflower plants requires 118 percent more fossil energy than the fuel produced. In assessing inputs, the researchers considered such factors as the energy used in producing the crop (including production of pesticides and fertilizer, running farm machinery and irrigating, grinding and transporting the crop) and in fermenting/distilling the ethanol from the water mix. Although additional costs are incurred, such as federal and state subsidies that are passed on to consumers and the costs associated with environmental pollution or degradation, these figures were not included in the analysis. "The United State desperately needs a liquid fuel replacement for oil in the near future," says Pimentel, "but producing ethanol or biodiesel from plant biomass is going down the wrong road, because you use more energy to produce these fuels than you get out from the combustion of these products." Although Pimentel advocates the use of burning biomass to produce thermal energy (to heat homes, for example), he deplores the use of biomass for liquid fuel. "The government spends more than $3 billion a year to subsidize ethanol production when it does not provide a net energy balance or gain, is not a renewable energy source or an economical fuel. Further, its production and use contribute to air, water and soil pollution and global warming," Pimentel says. He points out that the vast majority of the subsidies do not go to farmers but to large ethanol-producing corporations. "Ethanol production in the United States does not benefit the nation's energy security, its agriculture, economy or the environment," says Pimentel. "Ethanol production requires large fossil energy input, and therefore, it is contributing to oil and natural gas imports and U.S. deficits." He says the country should instead focus its efforts on producing electrical energy from photovoltaic cells, wind power and burning biomass and producing fuel from hydrogen conversion. * Comments: Post a Comment	Archive October 2002 November 2002 December 2002 January 2003 February 2003 March 2003 April 2003 May 2003 June 2003 July 2003 August 2003 September 2003 October 2003 November 2003 December 2003 January 2004 February 2004 March 2004 April 2004 May 2004 June 2004 July 2004 August 2004 September 2004 October 2004 November 2004 December 2004 January 2005 February 2005 March 2005 April 2005 May 2005 June 2005 July 2005 August 2005 September 2005 October 2005 November 2005 December 2005 January 2006 February 2006 March 2006 April 2006 May 2006 June 2006 July 2006 August 2006 September 2006 October 2006 November 2006 December 2006 January 2007 February 2007 March 2007 April 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 December 2007 January 2008 February 2008 March 2008 April 2008 May 2008 June 2008 July 2008 August 2008 September 2008 October 2008 November 2008 December 2008 January 2009 February 2009 March 2009 April 2009 May 2009 June 2009 July 2009 August 2009 September 2009 October 2009 November 2009 January 2010 RSS Feed Alternative feed Contact Tevita Something new: Agrobiodiversity Weblog: For discussions of conservation and sustainable use of the genetic resources of crops, livestock and their wild relatives. PestNet: For on-line information, advice and pest identification for the Pacific and beyond. Contact: Grahame Jackson. Pacific Mapper: For on-line mapping of point data over satellite images of the Pacific provided by Google Maps. DIVA-GIS: For free, easy-to-use software for the spatial analysis of biodiversity data.