Time's cover story this week debunks the idea that ethanol holds the promise of clean energy. But that's old news, right? Back in November, Mother Jones' "The Ethanol Effect" broke down America's newest cash crop, kernel by kernel. It reveals that growing one acre of corn requires 110 gallons of gasoline, and that ethanol's net energy output is far less than that of conventional fuel. Check out all the raw numbers here.

—Celia Perry

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