#160 - Brian Toon: NUCLEAR WINTER, Putin's Nuclear Threat, Accidental Launches, Global Policy, & Carl Sagan

Brian Toon is a professor of Atmosphere and Oceanic Sciences at the University of Colorado Boulder who is a leading expert on the planetary effects of nuclear weapons. His TED Talk 'I've Studied Nuclear War For 35 Years - You Should Be Worried' has over 7 million views on YouTube.