Right before the November election, the Real News Network released a 30-minute documentary called “The Doubt Machine: Inside the Koch Brothers’ War on Climate Science.” You can watch it above. It describes how Big Oil, and in particular the billionaire oil tycoons Charles and David Koch, have used their vast wealth and clout to undermine efforts to combat climate change.

The documentary is narrated by Oscar-winning actress Emma Thompson and directed by investigative journalist Bruce Livesey. It includes interviews with Jane Mayer, reporter with The New Yorker magazine and author of the book Dark Money; Naomi Oreskes, Harvard University science historian and co-author of the book Merchants of Doubt, Michael Mann, a climatologist at Penn State University; and Kert Davies of the Climate Investigations Center, among others.

You can learn more about the document and The Real News Global Climate Change Bureau at this site.  If you have time, it’s well worth watching the film.