Pennsylvania naturalists are keeping an eye on a disease that has been killing beech trees in the eastern U.S. for more than a decade, but has begun spreading more rapidly in the past three years.

IT’S LEAVING A GIANT PROBLEM IN ITS WAKE. BEECH TREES CAN BE FOUND ALL ACROSS BALTIMORE AND THE STATE, BUT THERE’S SOMETHING OUT THERE MAKING THEM SICK. AND YOU CAN TELL BY THE LEAVES. A BIG PROBLEM ...