From valley bottoms all the way to the tree line, nearly every single pine has been killed by an enemy smaller than a thumbtack: the mountain pine beetle. Tour British Columbia, and the scale of ...
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Melting ice in Wyoming reveals 5,900-year-old whitebark pine forest above current tree lineThe tree line, also known as the timberline ... They are also battling a pest called the mountain pine beetle and a deadly invasive fungus called white pine blister rust. Today, the whitebark ...
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