What did the Paris 2015 Climate Agreement change? what did the politicians at Paris actually achieve? On the 12th December 2015, at the 21st COP in Paris, representatives of 196 states reached an agreement to combat climate change that was celebrated around the world. With the long-term goal of keeping global temperature to below two degrees centigrade above pre-industrial levels, and covering areas such as nationally determined contributions and global stocktakes, Paris was heralded as a huge break-through. But four years on, and against the backdrop of the United States announcing its intention to withdraw from the agreement, what did the politicians at Paris actually achieve?   Join our host, philosopher Peter Millican, as he explores this topic with Fredi Otto, Acting Director of Oxford’s Environmental Change Institute and a lead scientist on the World Weather Attribution project; Richard Miller, a Senior Analyst for the Committee on Climate Change, whose research spans the physical and economic consequences of climate policy; and Sugandha Srivastav, a researcher on the post carbon transition, who’s previously worked at the Indian Council for Research on International Economic Relations.