are going to start a new round of the new paris deem. world leaders, including key u.s. allies have said, that's not hang. jim acosta, cnn the white house. >> a sign clearly states that climate change is real t. president, though, has questioned that on the campaign trail. let's now bring in a senior lecturer in international relations at the university of london. it's a pleasure to have you at this hour. again, let's talk more about this question that won't go away t. question of climb change t. president stated before on the campaign trail, he called eight hoax that's been cooked up by china. now his staff, none of them will own the words with him. what do you make of this? >> well, if you remember his remarks, when he announced this historic and upsetting decision for so many people. he didn't focus on what the issue of science, it's very much about america got getting the kind of deal for dealing with the environment that he feels