Last week two studies published in Science announced what anyone might have suspected all along. "Biofuels," rather than reducing carbon emissions, are adding two them -- possibly by a factor of nearly 100! The two studies may finally puncture the myth that anything is to be gained from burning crops for fuel. From the very beginning, there was never any indication that turning corn into ethanol was improving our energy independence. As that effort faltered, the myth arose that at least it was reducing carbon emissions. Now it has been shown to do neither. Meanwhile, thanks to a 51-cents-per-gallon tax...