Environmental Protection

American Lung Association v. EPA

In American Lung Association v. EPA, the Court of Appeals for the District of Columbia Circuit is considering whether a 2019 Environmental Protection Agency rule, which repealed the 2015 Clean Power Plan, violates the Clean Air Act.

Case Summary

Congress passed the Clean Air Act (CAA) over 50 years ago to wage a “war against air pollution.”  The CAA gives the Environmental Protection Agency (EPA) broad authority to enable it to achieve that objective.  In exercise of that authority, EPA issued a rule called the Clean Power Plan in 2015.  The Clean Power Plan set guidelines for states to follow in developing their own plans to limit carbon dioxide emissions from existing power plants.  Opponents challenged the rule, however, and the Supreme Court stayed its implementation, meaning the Clean Power Plan never went into effect.  In 2019, under the Trump Administration, EPA reexamined the Clean Power Plan, declared it unlawful, and repealed it, promulgating the Affordable Clean Energy rule in its place.  The American Lung Association and American Public Health Association, along with other organizations and localities, challenged these EPA actions in several consolidated cases in the D.C. Circuit.

CAC filed an amici curiae brief on behalf of members of Congress arguing that the Clean Power Plan was lawful and, therefore, that its rescission on the ground that it was unlawful was “arbitrary [and] capricious” in violation of the CAA.  EPA contends that it repealed the Clean Power Plan because it determined that the rule exceeded EPA’s authority under the CAA.  We argue, however, that the Clean Power Plan was a lawful exercise of the broad discretion Congress gave EPA in the CAA to determine how best to reduce air pollution—discretion the Supreme Court has repeatedly recognized.  Because the Clean Power Plan was lawful, we argue that EPA’s decision to rescind it on the erroneous ground that it was unlawful was “arbitrary [and] capricious” in violation of the CAA.

Case Timeline

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