New York Times: After much back and forth, James E. Hansen and I had agreed on a date to meet. Hansen, the director of NASAs Goddard Institute for Space Studies, is the scientist most closely associated with climate change activists like Bill McKibben, who has led the charge against the Keystone XL pipeline, and Michael Brune, the executive director of the Sierra Club. In Hansens view, the country needs to start moving away from fossil fuels now, before the damage becomes irreversible. As regular readers know,...