and presumably understands the differences between crop-based biofuels produced by sustainable methods in the US and clear-cutting tropical rain forests to produce palm-oil/soy monocultures for biodiesel...
...and has read and understands the peer-reviewed studies of US ethanol and biosdiesel production...
Environmental, economic, and energetic costs and benefits of biodiesel and ethanol biofuelshttp://www.pnas.org/cgi/content/full/103/30/11206Jason Hill*, Erik Nelson, David Tilman*, Stephen Polasky* and Douglas TiffanyNegative environmental consequences of fossil fuels and concerns about petroleum supplies have spurred the search for renewable transportation biofuels. To be a viable alternative, a biofuel should provide a net energy gain, have environmental benefits, be economically competitive, and be producible in large quantities without reducing food supplies. We use these criteria to evaluate, through life-cycle accounting, ethanol from corn grain and biodiesel from soybeans. Ethanol yields 25% more energy than the energy invested in its production, whereas biodiesel yields 93% more. Compared with ethanol, biodiesel releases just 1.0%, 8.3%, and 13% of the agricultural nitrogen, phosphorus, and pesticide pollutants, respectively, per net energy gain. Relative to the fossil fuels they displace, greenhouse gas emissions are reduced 12% by the production and combustion of ethanol and 41% by biodiesel. Biodiesel also releases less air pollutants per net energy gain than ethanol. These advantages of biodiesel over ethanol come from lower agricultural inputs and more efficient conversion of feedstocks to fuel. Neither biofuel can replace much petroleum without impacting food supplies. Even dedicating all U.S. corn and soybean production to biofuels would meet only 12% of gasoline demand and 6% of diesel demand. Until recent increases in petroleum prices, high production costs made biofuels unprofitable without subsidies. Biodiesel provides sufficient environmental advantages to merit subsidy. Transportation biofuels such as synfuel hydrocarbons or cellulosic ethanol, if produced from low-input biomass grown on agriculturally marginal land or from waste biomass, could provide much greater supplies and environmental benefits than food-based biofuels.
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Ethanol Can Contribute to Energy and Environmental Goalshttp://www.sciencemag.org/cgi/content/short/311/5760/50...Alexander E. Farrell,1* Richard J. Plevin,1 Brian T. Turner,1,2 Andrew D. Jones,1 Michael O'Hare,2 Daniel M. Kammen1,2,3To study the potential effects of increased biofuel use, we evaluated six representative analyses of fuel ethanol. Studies that reported negative net energy incorrectly ignored coproducts and used some obsolete data. All studies indicated that current corn ethanol technologies are much less petroleum-intensive than gasoline but have greenhouse gas emissions similar to those of gasoline. However, many important environmental effects of biofuel production are poorly understood. New metrics that measure specific resource inputs are developed, but further research into environmental metrics is needed. Nonetheless, it is already clear that large-scale use of ethanol for fuel will almost certainly require cellulosic technology.
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UC Berkeley press release...
http://www.berkeley.edu/news/media/releases/2006/01/26_...Ethanol can replace gasoline with significant energy savings, comparable impact on greenhouse gases
BERKELEY – Putting ethanol instead of gasoline in your tank saves oil and is probably no worse for the environment than burning gasoline, according to a new analysis by researchers at the University of California, Berkeley.
The researchers note, however, that new technologies now in development promise to make ethanol a truly "green" fuel with significantly less environmental impact than gasoline.
The analysis, appearing in this week's issue of Science, attempts to settle the ongoing debate over whether ethanol is a good substitute for gasoline and thus can help lessen the country's reliance on foreign oil and support farmers in the bargain. The UC Berkeley study weighs these arguments against other studies claiming that it takes more energy to grow the corn to make ethanol than we get out of ethanol when we burn it.
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"The people who are saying ethanol is bad are just plain wrong," he said. "But it isn't a huge victory - you wouldn't go out and rebuild our economy around corn-based ethanol."<end snip>
Furthermore, accusing US farmers of "crimes against humanity" for producing corn and soy for biofuels is just plain stupid.
(and please don't accuse them of CAH with your mouth open :evilgrin:)
Some people understand that in the Post Fossil-fuel Era sustainable organic agriculture will be have to be maintained by biofuels and renewable energy...
"Stopping" biofuels will solve absolutely nothing and create far more "problems" than they allegedly create...