Great Lakes' latest pollution threat: Microplastics
A new contaminant has turned up in western Lake Superior — tiny snarls, tangles and shreds of plastic that are appearing by the hundreds of thousands, mystifying scientists and Minnesota pollution regulators. While the level of debris doesn't approach the microplastic soup found near Hawaii, a gyre known as the Great Pacific Garbage Patch, it does exceed what's been found in the north Atlantic Ocean.
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