Leaders from around the world are converging on Paris for the 2015 U.N. Climate Change Conference. The two-week event is designed to allow countries the chance to come to an agreement on stifling climate change.

NPR's Ari Shapiro hosts a 1-hour special, with the help of NPR reporters, as well as experts from science, government, and business, to explain what's at stake and how it may — or may not — change the world's energy economy.