During the interview Bjørn also explained with some degree of difficulty through Stephen's shenanigans that the Earth's temperature has been rising for quite some time, even before the Model T Ford came to existence. He's selling a book, which I will probably not read, called "Cool It! The Skeptical Environmentalist's Guide to Global Warming" which calls for us to keep global warming in mind but to focus mainly on issues that are of much more importance.
If you're interested.
Oh.. and according to him the polar bears are fine.