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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)