Absent the early Church theologians you wouldn’t be worrying today about radical environmentalism because you would be on your knees as a slave to Islam.
I think the guy gives the environmentalist leaders too much credit for being misguided. While misguided may describe many of the joe-latte proponents, the leaders of the environmental movement have been shown to be a bunch of venal, pharisaical, exploiters of others who excel in hypocrisy. Simply put, they are environment pimps.