David Wallace-Wells, the author of "The Uninhabitable Earth: Life After Warming" speaks to Christiana Figueres, the former Secretary of the United Nations Framework Convention on Climate Change, about the catastrophic difference between the earth's temperature rising by 1.5 or 2 degrees Celsius by 2100. DAVID WALLACE-WELLS is the author of The Uninhabitable Earth: Life After Warming, a best-selling book based on a story he wrote in 2017, which was the most widely read in the history of New York Magazine. He writes about climate and other issues for New York. CHRISTIANA FIGUERES is the former Secretary of the United Nations Framework Convention on Climate Change and played a vital role in the negotiations that led to the landmark Paris Agreement of 2015. She is also the co-author of The Future We Choose: Surviving the Climate Crisis and the co-host of the Outrage + Optimism podcast. A transcript of this episode is available at Aventine.org Learn more about your ad choices. Visit podcastchoices.com/adchoices