Former President Donald Trump dismantled the pillars of U.S. climate policy when he exited the Paris climate accord and rolled back more than 100 regulations to protect air, water, endangered species and human health.

But it’s clear, as he officially assumes his role as the Republican nominee and standard bearer this week, that he altered American environmental protection in even deeper and more longer-lasting ways. 

The United States returned to the Paris pact after Trump’s presidency, but he showed other populist leaders a way out of the global climate agreement, which is itself now unstable. While no other nation has as yet followed suit and walked away, pledges to cut carbon emissions—already inadequate, according to the scientific consensus—are weakening. Insurgent right-wing politicians in Europe have embraced the Trump doctrine, insisting that backing down from climate pledges can boost faltering economies.

President Joe Biden’s administration has reversed most of the regulatory rollbacks of his predecessor, but Trump left behind a conservative 6-3 majority on the Supreme Court that has already irrevocably changed environmental protection in America. The biggest shock came on June 28, when the court overturned a 40-year-old legal precedent that buttressed federal regulatory action. By dismissing the so-called “Chevron doctrine,” the court handed […]

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