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Technology Review has a great 3-part article about the economy downturn and science of the biofuels in U.S.A.

“Now ethanol producers are struggling, and many are losing money. The price of a bushel of corn rose to record highs during the year, exceeding $4.00 last winter before falling back to around $3.50 in the summer, then rebounding this fall to near $4.00 again. At the same time, ethanol prices plummeted as the market for the alternative fuel, which is still used mainly as an additive to gasoline, became saturated. In the face of these two trends, profit margins vanished.”