Brief of Amicus Curiae Urban Air Initiative, Sierra Club v. Pruitt, No. 17-2174 (D.D.C. Apr. 5, 2018) by BoydenGrayStaff | Apr 5, 2018 | Court Filingshttps://boydengrayassociates.com/wp-content/uploads/2018/06/UAI-Amicus-Brief-Sierra-Club-v.-Pruitt-anti-backsliding-study.pdf