One year ago, President Trump announced the U.S. would exit the Paris climate agreement. Former New York City mayor and billionaire Michael Bloomberg is working to bypass Mr. Trump's opposition to the agreement, launching a new effort today to help the U.S. achieve the goals adopted by the Obama administration. Bloomberg joins "CBS This Morning" to discuss the $70 million he's pledging for the American Cities Climate Challenge, a program that will select 20 U.S. cities and help them speed up their efforts to reduce greenhouse gas emissions.
