Despite the overwhelming scientific consensus that global warming is a danger to the planet, little progress has been made to reduce CO2 emissions. Climatologists Brenda Ekwurzel and Michael Mann join us to examine the issue. Ekwurzel works with the Union of Concerned Scientists leading education aimed at increasing support for strong climate legislation. Mann contributed to the reports of the Intergovernmental Panel on Climate Change, which was awarded the Nobel Peace Prize in 2007, and is the author of The Hockey Stick and the Climate Wars: Dispatches From The Front Lines and Dire Predictions: Understanding Global Warming. Moderated by Ian Masters, journalist, author, screenwriter, documentary filmmaker, and radio host.