Cities have become a critical source of innovation across a wide array of policy areas that advance inclusion, equitable opportunity, and social justice. In the absence of state and federal action, cities and other local governments have taken the lead in enacting minimum wage and paid sick leave policies, expanding the boundaries of civil rights, tackling public health challenges, responding to emerging environmental threats, and advancing new technologies.

Cooperative federalism can lead to more efficient and pragmatic environmental protection, and allow states to develop effective programs tailored to their needs and resources. Nevertheless, the future of the federal-state relationship in the environmental context is uncertain as state and federal priorities come into conflict: for instance, EPA’s proposal to revoke California’s authority to regulate tailpipe emissions of greenhouse gases. Recent reports have begun a discussion on the future of cooperative federalism and environmental protection, but significant questions remain unanswered.