Millions of people worldwide depend on water that comes from mountain, both upstream and down. As climate change progresses, the world needs people who live in mountains to sustainably manage this water close to the source in order to protect the supply and quality for all who depend on it. Mountain communities are better able to steward local water sources if their livelihoods and economies are more resilient. More than 900 million people live in mountains and most rely directly on their ecosystem for a stable, predictable water supply. The survival of mountain people is intrinsically tied to mountain water sources.