Simon Donner had Bjorn pegged when he described how it's done
Climate change “skepticism” began with an industry-funded effort to question the science. It has since morphed into questioning whether the effects of climate change would really be so bad, a move I call the Smiling Lomborg.If you look at the act the first thing you see is the constant smirk. , use simple ways of stating the problems and challenge Lomborg on his basic economics/political science, in other words, don't let him duck out on the "But I am not a scientist", but confront him on what he claims to be. Lomborg really doesn't know the science. (Well Bjorn, as you say, you are not a scientist. That's real clear cause you just stepped in it again and why did you use that crazy stuff). He also has a very superficial understanding of economics, and as the economists move away from him he looksincreasingly foolish, but you do have to press him. found a good way of dealing with Lomborg
You can't go at Lomborg straight on, he will just laugh, look cool and leave you sputtering. Joe Romm would get his teeth handed to him by Lomborg. Michael Berube could. To paraphrease we need a way of dealing with Lomborg that does not give him what he wants: namely, (1) important concessions or (2) outrage. He feeds on (2), of course, and uses it to power the Copenhagen Consensus and Massive Persecution Complex he runs out of Denmark; and most of the time, we give it to him by the truckload. Realists need to try (3), mockery and dismissal, and thereby demonstrate that when someone tries to blame poverty and maleria on Al Gore having a large house, that person needs to be ridiculed and given a double minor for unsportsmanlike bullshit.
A day or so ago John Mashey posted a thorough deconstruction of Lomborg. This grows out of an earlier long exchange (references at the link) which also should be read by anyone who needs to be filled in on what is going on. However, by itself it is not effective because it treats Lomborg as serious rather than self-promoting. Think Bernie Madoff in a black shirt. They both smile a lot.