In March, EPA Administrator Lee Zeldin rolled out plans to overturn 31 environmental regulations aimed at curbing carbon emissions and protecting clean air and water, as part of a dramatic remaking of the agency.

"We are driving a dagger straight into the heart of the climate change religion," Zeldin said at the time, saying the effort would save "trillions in regulatory costs."

Among the regulations Zeldin said he would reconsider is an air quality standard established last year under President Joe Biden. By the end of the fall, according to an Environmental Protection Agency legal motion, Zeldin will propose a new, looser health standard for fine particulate matter — a byproduct of burning fossil fuels, wildfires and some manufacturing that has been linked to lung, heart and neurologic

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