University of Maine climate scientist Jacquelyn Gill examines a cone from a western pine at the Sawyer Environmental Research Center, Wednesday, May 4, 2022, in Orono, Maine. Gill says her work as a paleo-ecologist and climatologist has given her hope for the Earth's resilience despite global warming. Climate scientists who have been through a lot both personally and professionally say the key is often action. (AP Photo/Robert F. Bukaty)

University of Maine climate scientist Jacquelyn Gill poses in one of the school's greenhouses, Wednesday, May 4, 2022, in Orono, Maine. While most climate change news is gloomy, many scientists like Gill have found ways to remain optimistic about the future. (AP Photo/Robert F. Bukaty)

Climate scientists Kim Cobb, poses for a portrait at the Georgia Institute of Technology on Thursday, April 14, 2022, in Atlanta. She tells people when they are anxious about climate change, “there’s not going to be a win, a shining moment where we can declare success,” but “it’s never going to be too late to act. It’s never going to be too late to fix this.” (AP Photo/Brynn Anderson)

Climate scientists Kim Cobb, poses for a portrait at the Georgia Institute of Technology on Thursday, April 14, 2022, in Atlanta. She tells people when they are anxious about climate change, “there’s not going to be a win, a shining moment where we can declare success,” but “it’s never going to be too late to act. It’s never going to be too late to fix this.” (AP Photo/Brynn Anderson)