Photos from: An unconventional critical minerals push



A thick seam of black coal below a deposit of river rock.Hands holding a heap of coal ash with potential critical minerals.A front loader dumping material in the Wyodak coal mine in Wyoming.

Carol M. Highsmith/Library of Congress

Front loader working at the open-pit Wyodak coal mine in the coal-rich Powder River Basin outside Gillette, Wyoming.



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