Healthy air quality is a growing global concern. Robert Percival discusses the critical junctures in US environmental history that have led to global environmental regulation, particularly in relation to China. Referencing historical US air quality achievements, particularly the Clean Air Act, Percival points toward a turning point in China's legislation and attitude towards this environmental issue.

Robert V. Percival is the Robert F. Stanton Professor of Law and director of the Environmental Law Program at the University of Maryland Carey School of Law.