WUWT). He is David Siegel:
'Over the years, I built a set of assumptions: that Al Gore was right about global warming, that he was the David going up against the industrial Goliath. In 1993, I even wrote a book about it.
Recently, a friend challenged those assumptions. At first, I was annoyed, because I thought the science really was settled. As I started to look at the data and read about climate science, I was surprised, then shocked. As I learned more, I changed my mind. I now think there probably is no climate crisis and that the focus on CO2 takes funding and attention from critical environmental problems. I’ll start by making ten short statements that should challenge your assumptions and then back them up with an essay.'
His blog contains a great deal of material to back up his claims, and he is also intent on campaigning to 'educate influential liberals'. The term 'liberal' in the United States is used these days to denote 'leftwing', and that may well include the majority of schoolteachers and academics. Here on this blog we hope that in due course there will be massive efforts to help repair the damage that has been done to the minds and spirits of wave after wave of schoolchildren from recent decades. David Siegel's campaign may well be a crucial early step towards such a pastoral effort actually taking place.
PS Paul Matthews has compiled a list of relatively prominent people who have 'recovered their senses' about climate: https://ipccreport.wordpress.com/2015/01/08/converts-to-scepticism/