Representatives from nearly 200 nations have been attending the U.N. Climate Change Conference in Katowice since Dec. 2 to work on implementing the 2015 Paris climate agreement. Scheduled to end Friday, it will be extended two days due to discord.
States and cities are reacting to President Trump's withdrawal from the Paris Climate Agreement on Thursday. Three states formed the U.S. Climate Alliance; by Monday, it had grown to 13. Initially 30 mayors signed in support; it's now over 200.