Europe talks a good game on climate, but its emissions rose last year—while in the U.S., despite the efforts of the Trump administration, emissions fell.
European observers say that the Department of State's delegation helped drive progress in some key areas of the COP23 talks.
The U.S. delegation pushed nuclear and coal. The rest of the world rolled its eyes.
The country presiding over the United Nations climate summit rotates every year, but experts say location matters less than leadership.