The Biden-era auto emissions rules have significantly reduced the planet-warming greenhouse gases from transportation, which is the single largest source of carbon pollution in the United States.
Employees suspended in the summer after signing a letter critical of the president were told they could return to work. But the reinstatement was short-lived.
Oil and gas firms were supposed to start reducing methane, a powerful driver of climate change. The agency is giving them more time and may cancel the requirement.
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