Johan Rockström, director of the Potsdam Institute for Climate Impact Research and a leading climate scientist, described the Trump administration’s actions as the last gasp of fossil fuel interests. He argued that on a global level, the transition to clean energy was already accelerating despite Mr. Trump, driven by the economics of clean energy. In 2025, wind, solar and other renewable power sources surpassed coal as the leading producer of electricity. “We are at the beginning of the end of the fossil fuel economy,” Dr. Rockström said. “The U.S. is betting on the wrong horse.”