Al Gore stands to make a lot of money off of the GREEN and GLOBAL WARMING scare industry. Al Gore is one of the most gutless politicians of our time. Anyone with a pair of stones would WELCOME the chance to debate against someone who was viewed in the scientific industry as a worthy opponent. He has refused to debate people, saying (in effect) that these topics have already been discussed, it is a given that GWT is a severe problem, and everyone knows it.
Gore is a borderline criminal to begin with - he served as a conduit (or as my friend who served as a Captain in the Army for years would say, a "bag man") for $$$ coming from China. In case you weren't aware of the story, here's one of hundreds of links on it:
http://www.uwsa.com/Uwsadisclosure.chinese.html