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pinus

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White pine (Pinus strobus) showing the sort of yellowing that could be caused by ground-level ozone damage

White pine (Pinus strobus) showing the sort of yellowing that could be...

The Appalachia Forest Action Project measured changing rates in the mortality of trees in the mixed mesophytic forest. This photo of white pine needles on Joe Aliff's property shows the symptoms that led to the... More