Minnesota Public Radio slideshow:
The ethanol equation
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How much energy does it take to convert this corn into another energy source -- ethanol? That is one of the questions being asked as the Legislature considers whether to increase the ethanol content in gasoline.  (MPR file photo)

How much energy does it take to convert this corn into another energy source -- ethanol? That is one of the questions being asked as the Legislature considers whether to increase the ethanol content in gasoline.

(MPR file photo)
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