How Do We Know: Groundwater

Climate Central

Program Summary
Groundwater makes up about 20 percent of the world's fresh water supply. Find out how scientists are tracking the changing groundwater supplies around the world, and what it means for changes in global climate.

Related Scientist
Dr. Watkins is the project scientist for the Gravity Recovery and Climate Experiment (GRACE mission), based at NASA's Jet Propulsion Laboratory in Pasadena, CA.

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