As tree species face decline, ‘assisted migration’ gains popularity in Pacific Northwest

By  NATHAN GILLES  and  Columbia Insight The Associated Press PORTLAND, Oregon (AP) — As native trees in the Pacific Northwest die off due to climate changes, the U.S. Forest Service, Portland, Oregon and citizen groups around Puget Sound are turning to a deceptively simple climate adaptation strategy called “assisted migration.” As the world’s climate warms,

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