It’s not just the lodgepole pines that are dying in the Colorado mountains. Thirteen percent of aspen trees in the state are now affected by Sudden Aspen Decline, which is caused by disease and insects taking advantage of trees weakened by years of drought.
In 2006, there were 140,000 acres of aspen tree stands dying in Colorado. A year later, the number shot up to 338,000 acres of dead or dying aspen trees.
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