The defender of the environment now admits ethanol was a mistake. Will Congress heed his advice and end the corn industry’s $7 billion subsidy when it expires this month? By Robert Bryce Last week, Al Gore finally admitted the obvious. The former vice president (and winner of the Nobel Peace Prize) who promoted ethanol in his Oscar-winning film, “An Inconvenient Truth,†said that corn ethanol was a “mistake.†He went further, saying that he supported ethanol production because the first presidential primary is in Iowa, which produces more ethanol than any other state: “I had a certain fondness for the...