How climate change harms human health — and what can be done

From air pollution to wildfires, from heat waves to vector-borne diseases, climate change harms our health and causes significant stress to the healthcare system. Horizons moderator William Brangham explores what can be done to protect people from a warming world with Victor Tsao of the U.S. National Academy of Medicine and Lisa Patel of the Medical Society Consortium on Climate and Health.