Senator Bill Frist, MD is a heart and lung transplant surgeon and former US Senate Majority Leader, representing Tennessee from 1995 to 2007. He serves as Global Board Chair of The Nature Conservancy (TNC). His conservation work is rooted in his medical career, where patient health depends on clean air and water. In the Senate, he championed the Water for the Poor Act of 2005, expanding global access to safe water and sanitation, and was instrumental in enacting PEPFAR, which has provided life-saving HIV/AIDS treatment to 26 million globally. Since leaving office, he and his wife, Tracy, have led sustainable agriculture and conservation efforts in Tennessee and Virginia, and founded TNC’s Frist Initiative for Planetary and Human Health.