FILE - In this Wednesday, July 27, 2016, file photo, former New York City Mayor Michael Bloomberg waves after speaking to delegates during the third day session of the Democratic National Convention in Philadelphia. The former New York City mayor addressed his intensifying focus on climate change on Saturday, April 22, 2017, in an email interview with The Associated Press. Bloomberg said he wants to help save an international agreement to reduce carbon emissions. (AP Photo/Carolyn Kaster, File)