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Wilderness Survival: Using Pine Trees to Your AdvantagePine trees, as with any typical conifer, keep their needles all year. Deciduous trees, such as maple, birch, or hickory, drop their leaves as the days grow colder. This is a mechanism used to ...
But the mountain pine beetle is a troubling omen ... Foresters hand-fell any cluster of three or more trees that are green but actively infested—sometimes a whole stand—if there are enough ...
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