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How Do We Know: Groundwater

Published: Nov 9th, 2010

How Do We Know: Groundwater

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

Michael Watkins - 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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Top 10 Hardest Hit States of 2011

This slideshow recaps the year's extraordinarily destructive climate and weather events, including searing heat waves, parching

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