The Nobel Prize-winning economist Milton Friedman once said, "One of the great mistakes is to judge policies and programs by their intentions rather than their results."When Congress passed legislation to greatly expand America's commitment to biofuels, it intended to create energy independence and protect the environment. But the results have been quite different. America remains equally dependent on foreign sources of energy, and new evidence suggests that ethanol is causing great harm to the environment. In recent weeks, the correlation between government biofuel mandates and rapidly rising food prices has become undeniable. At a time when the U.S. economy is...