Daily health care operations in the US account for 8.5% of all greenhouse gas emissions. Shanda Demorest is a cardiac nurse and Associate Director of Climate Engagement and Education at Health Care Without Harm. She takes Dr. Josh Sharfstein on a virtual tour of a hypothetical hospital, pointing out opportunities for sustainability. They discuss how, despite a lack of regulation, health care systems are making pledges to reduce emissions—and how individual clinicians and patients can help the cause.