Christopher Leonard: David Koch was the ultimate climate change denier
(Phelan M. Ebenhack | AP file) David Koch speaks in Orlando, Fla., in 2013. Koch, major donor to conservative causes and educational groups, died on Friday, Aug. 23, 2019.
(Phelan M. Ebenhack | AP file) David Koch speaks in Orlando, Fla., in 2013. Koch, major donor to conservative causes and educational groups, died on Friday, Aug. 23, 2019.