Bjorn Lomborg doesn't just tweak the conventions of the environmental movement. With his tight t-shirts and casual attire, he also threatens policy lecturers' dress code norms. He's not even afraid to don his Cowellesque duds while testifying before congress.

Last week Lomborg slipped into another snug-fitting T and discussed his latest book, Cool It: The Skeptical Environmentalist's Guide to Climate Change, on LA36.

Check out the video here (right column).