Bryan Caplan and Robin Hanson interview – and challenge - Alex Epstein about his controversial new book, Fossil Future.  How many “climate denialists” really exist – and what should they take away from Epstein’s book?  How widespread is the view that “nature is sacred” – and what’s the best way to deal with it?  Why should we trust Epstein instead of most of the leading experts?  Why did he write Fossil Future instead of Nuclear Future? And much more.