Aspen Die-Off Mystery Solved

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People first started noticing lots of dying aspen trees six years ago. Eventually, the affliction spread to nearly 20 percent of Colorado’s aspens. Scientists had a name for it, Sudden Aspen Decline. But they didn’t really know why it was happening. Now they do. Jim Worrall of the U.S. Forest Service in Gunnison explains his findings to Ryan Warner. Then we hear from Norm Birtcher. He runs a plant in Mancos that turns dead and dying aspen trees into several products.