NEW YORK, NY - NOVEMBER 29: Bill Nye speaks during a press conference before a global climate march outside the City Hall on November 29, 2015 in New York City. The protest is part of an international weekend of action that is being mobilized to support climate activists in Paris whose massive march has been prevented by French authorities due to the recent attacks .Around 570,000 people have already marched in 2,300 events in 175 countries around the world. (Photo by Kena Betancur/Getty Images)
