Kaiser Permanente (KP), one of the largest health care providers in America, has a clear mission: improve health. In a surprising and welcome twist, KP is publicly recognizing that climate change threatens that mission. This health care leader is showing how an authentic, mission-driven connection to global issues can drive change.

The topic of climate change has become so politicized, it's rare to hear company representatives and CEOs admit that they're taking a course of action specifically in response to a climate-related threat. But that's starting to change, even in sectors you might not think have a direct stake in climate change.

KP is not a minor player in a health care industry that accounts for 16% of U.S. GDP and 8% of greenhouse gas emissions. With $44 billion in revenues, KP runs hospitals, clinics and health plans, serving more than 9 million members in nine states (and Washington, DC).