Environmental Protection Agency administrator Michael Regan testifies before the Senate Environment and Public Works Committee hearing to examine President Joe Biden's proposed budget request for fiscal year 2024 for the Environmental Protection Agency, on Capitol Hill, March 22, 2023, in Washington. The Environmental Protection Agency is tightening rules that limit emissions of mercury and other harmful pollutants from coal-fired power plants, updating standards imposed more than a decade ago. (AP Photo/Jose Luis Magana. File)
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