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Researchers have uncovered previously hidden sources of ocean pollution along more than 20 percent of America’s coastlines. The study offers the first-ever map of underground drainage systems that connect fresh groundwater and seawater, and also pinpoints sites where drinking water is most vulnerable to saltwater intrusion now and in the future.
While scientists have long known that fresh water and seawater mix unseen below ground, until now they hadn’t been able to pinpoint exactly where it was happening, or how much, except in limited locations.Image credit: Image courtesy of The Ohio State University
