POPP Act of 2023

S 1923 prohibits the Environmental Protection Agency (EPA) from finalizing, implementing, or enforcing its proposed rule (88 Fed. Reg. 33240, May 23, 2023) that would establish greenhouse gas emission standards for fossil fuel power plants. The bill argues this rule exceeds EPA authority under the Clean Air Act, as the required carbon capture and clean hydrogen technologies are not yet commercially proven or cost-effective. This directly prevents the implementation of the specific proposed rule without creating new regulatory requirements. The bill does not alter existing laws but blocks this particular EPA action.