James Biddle was taking notes on American University’s arboretum before he even became its arboretum manager. Walking across campus to interview for the job last October, he admired how plants added...

Weeds are a serious problem at the Anacostia Community Boathouse. The boathouse, run by volunteers and a single part-time paid employee, is home to eight rowing and paddling clubs who store...

By mile 46, I could recite the sentence that begins the Chesapeake & Ohio Canal Trail’s informational signage: “Stretching from Washington, D.C. to Cumberland, Maryland, the Chesapeake...