It's very rare that global warming propagandists debate sceptics - bitter experience has shown them that they always lose. Recently however, a couple of greens agreed to a debate hosted by the University of St Andrews debating society, with Richard Courtney and Nils-Axel Morner putting the sceptic case.
The greens seem to have lost again - or at least not to have won enough votes to pass their motion.
Report here (It was originally posted at Icecap, but I can't find a permalink there).