Photo: Virginia Tech
A tiny, invasive bug is bringing down hemlock trees from Appalachia to southern Canada. And scientists fear another treasured native tree may be going the way of the American chestnut, forever changing forest ecosystems. Researchers at Virginia Tech are hoping to beat the invaders at their own game. They’re using a new invasive species to keep an old one in check, and save the American Hemlock tree. Robbie Harris has more.
