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Water, Water Everywhere
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Peter and Maria Hoey
By now, you're likely familiar with the concept of the "carbon footprint"—the amount of carbon dioxide that producing some item or performing some activity releases into the atmosphere. Illustrated below is a water footprint: the amount of H2O it takes, whether via irrigation or industrial process, to make the common objects of our daily lives. Given a growing U.S. population, limited water resources, a deep drought in some parts of the country and looming shortages in others, and the wild card of climate change, it's a metric we'll all be hearing more about soon. —Paul Rauber
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