Silent Insect Killer Ravages American West

The American West is under attack by a silent killer that's causing some of the worst-ever destruction to hit the nation's forestland: the mountain pine beetle. "People are looking out their windows and seeing dead trees where they used to see green," said Sandy Briggs from the Forest Health Task Force in Aspen, Colo. Despite their small size (approximately 5 millimeters when fully grown), these beetles are doing enormous damage, wiping out millions of acres of lodgepole pines as an epidemic...Full Story
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