As the year comes to a close, 2025 looks like a turning point in the world’s fight against climate change. Most conspicuously, it was the year the U.S. abandoned the effort. The Trump administration pulled out of the 2015 Paris Agreement, which unites virtually all the world’s countries in a voluntary commitment to halt climate change. And for the first time in the 30-year history of the U.N.’s international climate talks, the U.S. did not send a delegation to the annual conference, COP30, which took place in Belém, Brazil.

The Trump administration’s assault on climate action has been far from symbolic. Over the summer, the president pressed his Republican majority in Congress to gut a Biden-era law that was projected to cut U.S. emissions by roughly a third compared to their peak, putt

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