Report: US’s largest estuary, Chesapeake Bay, earns D-plus

ANNAPOLIS, Md. (AP) — An environmental group gave the Chesapeake Bay watershed a D-plus grade in an evaluation released on Thursday — the same grade earned in its last report two years ago. Efforts to restore the nation’s largest estuary are struggling to reduce agricultural pollution, the Chesapeake Bay Foundation said in a news release on its State of the Bay report, which is released every two years.