Kelly Wanser, executive director of SilverLining, on the Hornet, a decommissioned aircraft carrier that is now a museum in Alameda, Calif., on April 2, 2024. Wanser is a former technology executive who helped establish the marine cloud brightening project at the University of Washington. In 2018 she created SilverLining, a nonprofit organization to advance research into what she calls "near-term climate interventions" like cloud brightening. (Ian C. Bates/The New York Times)