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At the RETECH 2009 conference in Las Vegas recently, I learned about an interesting crop during the "Advanced Conventional Biofuels" breakout session. Phil Madson, the president of KATZEN International, said that a plant called "Sunspuds" could provide the solution to America's ethanol production limit. Katzen said he believes that 6 billion gallons of ethanol a year is the upper limit of America's domestic corn ethanol production, and that every time we go above that limit there will be some so

At the American Council on Renewable Energy's RETECH conference and expo last week, I was able to listen to a few presentations on renewables and transportation. It's always interesting to hear about the auto industry from people on the outside, and the RETECH presentations lived up to expectations. I'll be writing about a few of them this week.

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