[2] “Issue Brief: The Impact of Ethanol Production on Food, Feed and Fuel”, Summer 2007, Ethanol Across America, www.cleanfuelsdc.org/pubs/documents/FoodFeedandFuel.pdf
[3] Film: “King Corn: You Are What You Eat”, 2007, Michael Pollan, Ian Cheney, Curt Ellis and Stephen Macko.
[4] “The Switchgrass Solution”, Evan Ratliff, WIRED Magazine 15.10, October 2007.
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