Earth Day 2016 brought a significant milestone for the Paris Agreement, as some 175 nations signed on at the UN Headquarters in New York City. Yet the ambitious goals of this climate agreement are not guaranteed without aggressive moves to curb carbon pollution. Host Steve Curwood sits down with Christiana Figueres, Executive Secretary of the UN Framework Convention on Climate Change, to discuss what’s required to give civilization a fighting chance. (published April 22, 2016)