Michael Mann is a peer of Richard Alley from last week's show. They both study climate and have come to the conclusion that industrial humans have induced climate change. Mann has been on the receiving end of some pretty horrendous accusations in the past months, accusations we have dealt with on Sustainability Now with students, with Ed Perry of the National Wildlife Federation, and the ethical implications of which we have tackled with Don Brown.
For various reasons, we haven't been able to get Dr. Mann on the show (though we will still pursue it). In our stead, we provide you with an excellent link to his conversation with Chris Mooney at Point of Inquiry. Mooney is the author of the excellent books The Republican War on Science and blogger at The Intersection. Enjoy.