Climate change is the largest threat to global health in history. Health systems, on the other hand, exist to promote, protect and improve people’s health, and to prevent and treat disease. As large, resource and energy-intensive organizations that employ many people, health systems produce large amounts of greenhouse gases. Therefore, they contribute to climate change, raising the paradox that, on balance, they may, inadvertently, do people’s health more harm than good in the long term.
