This author should write children's books as his science is based really on a complete fraud, Bill McKibben, who is a pied piper shill for the Tides Foundation and Larry Rockefeller.  The other guy, Hanson, with his famous hockey stick graph is so discredited and his conclusions completely out of whack with reality,  he has no moral or relevant views as he has also been shown to create facts and scenarios that failed to prove anything. I suggest this retired educator may have retired too early as he needs a lot of schooling himself obviously.