i'm joined by kenneth gillingham, professor of economics at the school of the environment at yale universityt is— announcement to you? it was quite a surprise, actually. it is very - surprise, actually. it is very interesting because there was a long set of work under way behind—the—scenes that made it possible that wasn't open to anyone, no one knew this was happening, although maybe you would have expected it to happen because there was a lot of agreement in the past and cooperation in the past under the obama administration on climate. although the relationship between the us and china has been quite acrimonious recently. so it was a definite surprise and i would say it is a jolt of fresh air.— is a jolt of fresh air. yes, that is what we are _ is a jolt of fresh air. yes, that is what we are all— is a jolt of fresh air. yes, that is what we are all talking - is a jolt of fresh air. yes, that is what we are all talking about, i is a jolt of fresh air. yes, that is i what we are all talking about, fresh air, the desire for fresh air, what we are all talking about, fresh air, the desire for