By National Law Review.

On August 21, 2018, the Environmental Protection Agency (EPA) issued a proposed rule pursuant to section 111(d) of the Clean Air Act (CAA) that would establish emission guidelines for states to develop plans to limit carbon dioxide (CO2) emissions from existing fossil-fired power plants. The proposed Affordable Clean Energy (ACE) rule would replace the 2015 Clean Power Plan (CPP), which EPA is proposing to repeal (in a separate rulemaking) on the grounds that the CPP exceeded the agency’s authority under the CAA.