On January 19, 2021, the U.S. Court of Appeals for the District of Columbia Circuit struck down the Affordable Clean Energy Rule (ACE), which the Environmental Protection Agency (EPA) promulgated in 2019 to replace the Obama-era Clean Power Plan (CPP). The CPP had sought to reduce greenhouse gas (GHG) emissions from existing power plants, in part, by authorizing states to increase renewable generation. As explained in a previous post, EPA had reasoned that it had the discretion to define the best system of emission reduction (BSER) at a plant under Section 111 of the Clean Air Act (Act) to include measures employed outside the facility (such as new renewable resources) that were located “beyond the fenceline.” Stayed by the Supreme Court in 2016, the CPP never went into effect. Instead, the Trump administration repealed the CPP and replaced it with ACE. In ACE, EPA reasoned that Section 111 of the Act required EPA to only find BSER to be a technology that could be applied “inside the fenceline” on the facility.
On January 20, 2021, President Joe Biden issued an executive order, “Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis.” The order directs executive agency heads to review hundreds of agency actions implemented during the Trump administration, including more than 120 related to energy and the environment. In addition, the order suspends or revokes, in whole or in part, nearly one dozen executive orders issued by the prior president directly tied to energy infrastructure.