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St. Paul, Minn.

Not all biofuels are equal

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Switchgrass
The U.S. Department of Energy is looking to fast-growing switchgrass as a new biofuel resource.
MPR Photo/Mark Steil
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Switchgrass
The U.S. Department of Energy is looking to fast-growing switchgrass as a new biofuel resource.
MPR Photo/Mark Steil
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