Climate action is an urgent public health imperative. Climate change is causing excess morbidity and mortality and posing an increasing threat to mental health and well-being. The US health care sector is a significant contributor to this problem. A. Eugene Washington, MD, of Duke University, discusses accelerating climate action with JAMA Editor in Chief Kirsten Bibbins-Domingo, PhD, MD, MAS. Related Content: Accelerating Climate Action Through Academic Health Systems