Over the last decade, the U.S. played a big role in the U.N. efforts that would seek to curb emissions coming from the commercial aviation industry. However, the shift in American climate policy is allowing other countries to diminish this proposal at the UN. Plus, Energy Secretary Rick Perry responds to accusations from Ambassador Gordon Sondland, who said Perry knew about the investigations at the heart of the impeachment probe. And, climate activist, billionaire, and former New York City mayor Michael Bloomberg confirmed this weekend that he is running for the Democratic candidacy ahead of the 2020 presidential election. Find more on the show at politico.com/energy-podcast.