Paying attention to the buzz around Planet of the Humans, the new film by Michael Moore, is like standing in the middle of a three-ring circus. In ring #1 are the filmmakers, who raise critical questions about how renewable sources can power industrial society, but do so with questionable facts and mean-spirited attacks. In ring #2 are the left-wing enviros, who are barfing out lazy accusations of ecofascism and doing all they can to avoid addressing the film’s legitimate questions about popu...