The United Nations Climate Change Conference in Warsaw, Poland last year achieved modest progress toward an international agreement on reducing carbon pollution. In 2015, the heads of nearly 200 nations will again meet, this time in Paris, and the hope is that they can seal a deal that would take effect in 2020. But rich and developing countries are still far apart on who should bear responsibility for increasing human impacts of severe weather. Even some of the most vigorous proponents of moving away from fossil fuels doubt the UN process will ever produce a treaty with teeth. Ambassador Todd Stern is US Special Envoy for Climate Change, a position he also held during the Clinton administration. Stern started his talk at the Commonwealth Club with a summary of where we are in a process that started two years ago: “[At the] Conference of the Parties, the COP in South Africa, there was a decision to start a new negotiation that would cover the period of the 2020s, in which the parties would negotiate an agreement, legal in some way.” And its due date is 2015. “As it turns out, the big climate meeting at the end of 2015 is going to be in Paris. So we sit right in the middle of that process, about halfway through.” Ambassador Todd Stern, United States Special Envoy for Climate Change This program was recorded in front of a live audience at The Commonwealth Club of California on February 19, 2014 Learn more about your ad choices. Visit megaphone.fm/adchoices