With their wide-spreading, leafy branches, ash trees are quite popular in the U.S., but they're being seriously threatened by ...

Ash dieback and other tree diseases are resulting in significantly more greenhouse gas emissions than previously thought because a large amount of carbon is escaping from woodland soils, a study has ...

Jen asked: I have a lot of dead branches on the inner part of my ash tree. Is this a sign that it has Emerald Ash Borer or something else that causing the tree to die? Does it help the tree to remove ...

A Colorado city is fighting to save tens of thousands of its trees from a "devastating" death. But it's not deforestation or wildfires they are up against this time – it's a tiny half-inch-long bug.