Duck and Cover

So Al Gore loves to talk about Global Warming. Except when he doesn't (H/T Instapundit):

As over 150 heads of state and government gather at UN headquarters in New York to discuss climate change, former Vice President Al Gore, the most prominent proponent of the theory of the human-induced, catastrophic global warming, continues to refuse repeated challenges to debate the issue.

Czech President Vaclav Klaus, who addressed the General Assembly on climate change September 24, is but the latest global warming skeptic to receive the cold shoulder from Gore. In ads appearing in the Wall Street Journal, New York Times, and Washington Times, Klaus has called on Gore to face him in a one-on-one debate on the proposition: "Global Warming Is Not a Crisis." Earlier in the year, similar challenges to Gore were issued by Dennis Avery, director of the Center for Global Food Issues and senior fellow at the Hudson Institute, and Lord Monckton of Brenchley, a former adviser to British Prime Minister Margaret Thatcher. All calls on the former vice president to face his critics have fallen on deaf ears.

Read the whole thing.

So I ask the question: why is Al Gore afraid to debate on Global Warming if the facts are allegedly so much in his favor? Why will he only talk to audiences who drink his kool-aid, or only before audiences who are not allowed to question his "facts?"