An invasive, tree-killing pest has made its way to Portland, spelling trouble for the many ash trees that cool residential neighborhoods on hot summer days. On Wednesday, Oregon forestry officials ...
The emerald ash borer first appeared in Michigan in 2002. Photo by Carl D. Walsh/Portland Portland Press Herald via Getty Images For 18 years, North American ash trees have been under attack by a half ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results