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Mary Esch | The Associated Press

A beetle that has killed millions of acres of pines in southern forests is munching its way north, and new research suggests its tree-killing prowess could be magnified in cooler climes. more

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When Gary Lovett was studying the effect of acid rain in New York's Catskill Mountains 20 years ago, he ended the experiment early because so many trees in the test plots were dying — not from acid rain, but from insect attacks. more

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