On the August 31 episode of Late Show With David Letterman, Dave welcomed environmentalist and author Bill McKibben. His new book is a work of advocacy, an appeal to the public to take serious the challenges of global climate change and act now.
Buy Eaarth: Making a Life on a Tough New Planet by Bill McKibben from Amazon for the Kindle or from Barnes and Noble for the Nook or from the Kobo store.
