EcoWatch: Director Robert Kenners 2008 documentary Food Inc. inspired dramatic growth in local food movements across the country with its expose of industrial-scale food production. His new documentary Merchants of Doubt takes on another threat to the health and well-being of the U.S. and the world: the glib and seasoned marketers who sell the idea that climate change is a hoax. The film made the rounds of festivals last year. Today it opens in theaters in Los Angeles and New York City with opening across...