Earlier this year, Charleston University, West Virginia, USA, hosted a debate on climate change issues between Dr Michael Mann (author of the notorious 'hockey-stick'), fellow alarmist Admiral David Titley, and, on the skeptic side, Dr Judith Curry and Dr Patrick Moore (former founder of Greenpeace). This post has two sections of YouTube videos: first the explanation by Dr Moore of why he changed from alarmist to skeptic; the second the full debate.