A climate action Big Year, pitching in somehow (how?) to better our world? The current crop of US docos, targeted for election season, does motivate that drive. Here’s a 30-minute expose of something we’ve observed with dismay over the last decade (The Doubt Machine: Inside The Koch Brothers’ War on Climate Science). Perhaps there’s nothing overwhelmingly fresh in it but this movie is stylish and to the point. A must-watch.