Another doc that will raise your gorge – but will it only speak to the converted?—is from the maker of “Food Inc.,” Robert Kenner. “The Merchants of Doubt” takes aim at the spin masters who, following a playbook established by the big cigarette companies, use their corporate might to cast spurious doubt on the reality of climate change. Masquerading as grass roots efforts, but in fact funded by the oil and gas industry, these duplicitous corporate campaigns have been infuriatingly successful in forestalling any action on climate change. More research needs to be done…we don’t really know if global warming is man made… there are two sides to every story… so the mantra of disinformation goes, when in fact the scientific community is nearly unanimous on the subject. The media, of course, contributes to the charade in its insistence that it is only “fair” to give equal weight to each “side.” While a lot of this will be familiar to the documentary audience, Kenner’s polished and deftly argued film finds compelling subjects on both sides of the fence, from the proudly sleazy Marc Morano, who boasts of his underhanded tactics to discredit the science, to the touching figure of South Carolina Republican Congressman Bob Inglis, who, faced with the evidence, reversed his position on global warming and fought for change – with devastating political repurcussions to his career.