His PhD thesis solved a mystery — and may help turn a lake blue again
Growing up, Eli Hall’s family often visited the Allegheny Reservoir, a man-made lake that straddles the border between Pennsylvania and New York. Driving north along the shores, they’d see blue waters, boaters, swimmers, everything you’d expect from a summer lakeshore. But following that road into the Seneca Nation of Indians’ Allegheny Reservation, they’d see the reservoir change. Gone were the boaters and swimmers and gone were the blue waters. In their place was a mess of green algae. But why?








