How much could an average global temperature rise of six degrees really change things? The National Geographic Channel will give us a preview with the world premiere of “Six Degrees Could Change the World” at 7pm CT this Sunday (February 10th). We’ll spend this hour with the program’s host, Mark Lynas, a National Geographic Emerging Explorer and author of the new book “Six Degrees: Our Future on a Hotter Planet” (National Geographic, 2008).
