The circular economy has gone mainstream as a goal in the transitions toward a more sustainable society. Often, however, laws that promote a circular economy remain vague or narrowly focused on resource efficiency, obscuring the fact that they have multiple environmental effects and can lead to environmental trade offs. This Article examines how to properly frame circular economy laws for sustainability, focusing on product-service systems generally and the case of car sharing in particular.

On October 29, 2021, the U.S. Supreme Court granted certiorari in West Virginia v. Environmental Protection Agency, a petition filed by several states and coal companies attacking the U.S. Environmental Protection Agency's (EPA’s) regulatory authority under the Clean Air Act (CAA). The Court’s holding in this case would determine EPA’s continued ability to use the CAA—including the national ambient air quality standard (NAAQS) program—as a climate change tool.