Cities are working to make congestion zones safer for their populations, especially for sensitive groups like children and those with respiratory conditions. Emilia Simeonova, PhD, John Hopkins University, and James Scales, PhD, Queen Mary University of London, discuss how decisions made in major metropolises like New York City, Stockholm, and London affect the quality of air and overall health of individuals. Hosted by Erika Moseson, MD, host of the Air Health Our Health podcast. This episode highlights the research of clean air zones and the challenges that arise during the process of implementing these changes.