In this Wednesday, May 19, 2010 photo, a blue rectangular piece of microplastic is visible on the finger of Julie Masura, a researcher with the University of Washington-Tacoma environmental science program, as Masura examines debris from a collection filter that was pulled through the Thea Foss Waterway, in Tacoma, Wash. Masura and other scientists are developing methods to measure the level of microplastics — tiny plastic particles no larger than a ladybug — in seawater and sediments by sampling the waters of Puget Sound. (AP Photo/Ted S. Warren)

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