Word: tamarack
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Dates: during 1950-1959
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...most noticeable in Canada. The mean annual temperature of Montreal, said Dr. Kimble, has risen from 42°F in the 1880s to 46°F in 1950. Along the bleak natural boundary between Canada's forests and the barren Arctic, the trees are marching northward. Saplings of tamarack, spruce and birch are appearing where none grew before...