pledges by big polluters boost Paris hopes

In this Saturday, Nov. 11, 2017 file photo, Patricia Espinosa, executive secretary of the United Nations Framework Convention on Climate Change, smiles in the U.S. Climate Action Center during the “AMERICA’S PLEDGE” and “WE ARE STILL IN” campaign at the COP 23 Fiji UN Climate Change Conference in Bonn, Germany. The U.N.’s climate chief Patricia […]