The Trump administration is moving to eliminate federal greenhouse-gas limits for most coal- and natural-gas-fired power plants, undoing a central Biden climate policy and reviving a broader rollback of limits adopted under President Barack Obama. Environmental Protection Agency Administrator Lee Zeldin signed the regulatory documents Monday. The EPA said repealing the 2024 standards would reduce energy costs, improve electricity availability and save power producers at least $310 million in compliance expenses. The agency also said coal generation could increase tenfold as a result. The action comes as the administration points to higher energy prices, including increases linked to the war with Iran, as a reason to ease regulations on fossil-fuel producers. “Americans will see a decrease in electricity prices, but this is just the beginning,” Zeldin said in a statement. “Realizing the full potential of American energy means more jobs, lower prices, and a more prosperous America.” The EPA published two measures. One final rule would partially repeal the Biden administration’s Carbon Pollution Standards, which the agency said power plants could not meet by 2032 without forcing some facilities to close. A second proposal would consider removing all federal greenhouse-gas limits imposed on fossil-fuel power plants since 2015. The decision drew praise from Republican lawmakers and condemnation from environmental organizations and Democrats, who said the rollback would worsen air pollution and climate change while benefiting fossil-fuel companies. Sen. Shelley Moore Capito, a West Virginia Republican who chairs the Senate Environment and Public Works Committee, said the administration was ending what she called a “Biden-era Clean Power Plan 2.0.” She argued the rules would have undermined coal and natural-gas generation and raised electric bills. Democrats said the EPA’s cost analysis failed to account for the financial and health consequences of climate pollution. Sen. Sheldon Whitehouse of Rhode Island, the committee’s top Democrat, said the Biden rule was projected to prevent roughly $20 billion a year in climate-related damages and health care costs. “The fossil fuel-captured EPA’s decision to end its regulation of greenhouse gas emissions from power plants is a tragic and expensive mistake,” Whitehouse said, arguing that the change would transfer the costs of climate disasters to households across the country. The rollback follows the administration’s repeal last year of the EPA’s “endangerment finding,” the scientific and legal foundation for federal regulation of greenhouse-gas emissions because of their threat to public health and welfare. In announcing the power-plant action, the EPA said greenhouse-gas emissions from power plants have no material effect on global climate change. That claim conflicts with the agency’s own public materials, which describe electricity generation as the nation’s second-largest source of carbon dioxide pollution and link the sector to climate change, health risks and ecosystem damage. Pete Wyckoff, vice president for policy at the climate advocacy group Evergreen Action, said the administration’s position contradicted the EPA’s existing analysis. He said the U.S. power sector alone would rank among the world’s largest sources of climate pollution if it were treated as a country. With federal limits weakened or removed, states and local governments may face pressure to impose their own standards on fossil-fuel power plants. Whitehouse said the federal retreat could prompt more state-level regulation while leaving communities to absorb the effects of more frequent extreme heat, flooding, drought and other climate-related disasters. The final rule and proposed changes are expected to face legal and political challenges as the administration seeks to expand coal and gas generation and limit federal oversight of power-sector emissions.