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Great Lakes Plastic Pollution

In this 2012 photo provided by 5gyres.org, Sherri Mason, right, a chemist with State University of New York at Fredonia and one of the project leaders, works aboard a research vessel on Lake Erie with a device that skims the water surface collecting samples in finely meshed netting. Scientists discovered masses of floating plastic particles in Lakes Superior, Huron and Erie last year. This summer, they're widening the search to Lakes Michigan and Ontario. They are trying to determine whether fish are eating the particles, which may come from city wastewater, and passing them up the food chain to humans. (AP Photo/Courtesy 5gyres.org)

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