1. Looking Back at 50 Years of the Clean Air Act
2. Axelrod, J. 2020. 50th Anniversary of NEPA: Five Decades of Ignoring the Environmental Impacts of Immigration. Center for Immigration Policy, January 20. https://cis.org/Axelrod/50th-Anniversary-NEPA-Five-Decades-Ignoring-Environmental-Impacts-Immigration.
3. Clean Air Act Advisory Committee 2021. The 50th anniversary of the clean air act. https://www.epa.gov/system/files/documents/2021-11/final-caaac-50th-anniversary-report-2.3.pdf
4. Cohen, S. 2022. Supreme court and radical environmental deregulation. Columbia Climate School, June 21. https://news.climate.columbia.edu/2022/06/21/the-supreme-court-and-radical-environmental-deregulation/.
5. What Do Economists Have to Say about the Clean Air Act 50 Years after the Establishment of the Environmental Protection Agency?