https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8769753
Cleaning Plant at Virginia-Pocahontas Coal Company Mine #1 near Richlands, Virginia.
Conveyors Take the Coal From a Storage Silo to the Plant Where It Is Washed and Graded by Automated Equipment in a Control Room. The Mine Digs Metallurgical Coal for Use. Photographer: Corn, Jack. Original public domain image from Flickr
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