water worries cloud future for U.S biofuel
http://uk.reuters.com/article/idUKTRE53D00A20090414
Biodiesel Makes Haste With Waste
http://www.wired.com/autopia/2006/12/biodiesel_makes/
While today biodiesel relies on agricultural crops or waste vegetable oil for raw material, a heaping portion of the fuel could come from plant waste and animal fat that would not take resources from the food supply.
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