In this March 19, 2019 file photo, the blades of wind turbines catch the breeze at the Saddleback Ridge wind farm in Carthage, Maine. Scientists say emissions worldwide need to start falling sharply from next year if there is to be any hope of achieving the Paris climate accord’s goal of capping global warming at 1.5 degrees Celsius (2.7 Fahrenheit). (Photo by Robert F. Bukaty/AP Photo/File)
