The Paris Agreement requires countries to increase their climate ambition every 5 years and the first test of that arrives in 2020. Christiana, Tom and Paul discuss the political outlook and which countries can lead this with the US so firmly out of the picture. Christiana then discusses the issue with Ben Rhodes, former Deputy National Security Adviser to President Obama, and specifically discusses his experience with Modi and Xi and what it will take for them to lead the world to greater climate action.