The U.S. Environmental Protection Agency (EPA) announced Monday that it would repeal the Biden administration’s carbon emission rule on coal- and gas-fired power plants. Had the rule remained, it would have forced reliable coal plants off the grid and hobbled their natural-gas replacements, as American electricity demand soars after 15 years of little growth.

The Biden Administration’s rule, finalized in 2024, would have forced coal and new natural gas plants to install costly and commercially unproven carbon capture and sequestration technology to capture 90% of their emissions or shut down by 2039. Faced with complying in only six years, almost all coal plants would shutter rather than incur such high costs. Remaining coal plants and new natural gas plants would be saddled with new costs, which land ultimately on American families and businesses already facing steep electricity price increases.

The Biden EPA underestimated the rule’s compliance costs. Our research modeled its effects on the Southwest Power Pool, the grid operator spanning 13 states at the time, or about 6% of the U.S. population. Under the rule, building a portfolio of wind,........

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