Deborah A. Sivas & Matthew J. Sanders, Brief of Administrative Law Professors as Amici Curiae in Support of State and Municipal, Public Health and Environmental, Power Company, and Clean Energy Trade Association Petitioners, American Lung Ass'n, et al., Petitioners, v. U.S. Environmental Protection Agency, et al., Respondents, no. 19-01140 in the U.S. Court of Appeals for the District of Columbia Circuit (April 22, 2021).