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Filename: | px-0524-d.jpg |
Image Description: | Hudson Mills, Michigan - An emerald ash borer trap tree at Hudson Mills Metropark. Researchers from Michigan Technological University use the trap trees to study the spread of the invasive pest. The emerald ash borer, a native of Asia, was discovered near Detroit in 2002. Since then it has killed tens of millions of ash trees in the United States and Canada. |
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