Mark Steyn vs Michael Mann, Climate Change: The Facts, Keynote 4, ICCC10

Mark Steyn talks about his new book, “Climate Change: The Facts” and his lawsuit against climate scientist Michael E. Mann of Penn State University at The Heartland Institute’s Tenth International Conference on Climate Change on June 12, 2015. To watch all presentations from this conference and others, visit . To read all of Mark Steyn’s work, visit