Stock Photo - Dunbar, Pennsylvania - A beehive coke oven, reconstructed by the Dunbar Historical Society to commemorate the region's coal, coke, and steelmaking history. At its peak in the early 1900s, 38,000 coke ovens around Connellsville seriously polluted the region's land and air, while producing half the U. S. supply of metallurgical coke for steelmaking.

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