"Climate of Doubt"
In 2008, climate change was hot. Politicians in both major parties, pressed by an anxious public, seemed poised to act. Today public opinion has cooled and politicians ignore the issue or proclaim their skepticism of scientific evidence that human activity is imperiling the planet. FRONTLINE correspondent John Hockenberry of PRI's "The Takeaway" goes inside organizations that have fought the scientific establishment, environmental groups and lawmakers to shift the direction of debate on climate issues and redefine the politics of global warming.G