Obama is set to unveil a new rule on carbon emissions that he said will reduce carbon dioxide emissions by 30% by 2030.
In a letter to Congress, the White House said the new rules would apply to most domestic coal-fired power plants and will reduce power plant carbon emissions by 35% by 2025.
The administration said the rules will also be able to reduce emissions from new coal-burning power plants, new gas-fired plants, and new oil- and gas-fueled power plants by 30%.
The White House did not say how much the rules would cost.
In its announcement, the EPA said the regulations would have an impact on all U.S. coal-power plants.
But it did not provide a cost estimate.