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Cathie Katz scours the beach almost daily looking for treasures. "Beachcombers collect all the stuff that other people just pass by," she says. (Photo by Carl Bower)

Beachcombers Turn Trash Into Treasure
Thanks to a network of beachcombers around the world -- a group becoming more connected, organized and efficient -- environmentalists and scientists can now follow things swept from one place to another in the ocean's roiling currents. That's important for tracking everything from weather systems to the movement of oil spills.
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