He probably will refuse. If he did attend, it would have a negative effect on his income from his crazy ideas. But he has a lot of followers that listen to ANYTHING he says.
Why debate a "denier"? It's a religion. No facts required.
Gore is the high priest. Our economy is the demon to be exorcised.
I do hope The "great global warming swindle" will do to Gore what the Swift boat vets did to Kerry.... expose the fraud.