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Brown coal (lignite). This form of coal has a high moisture and ash content, and is a more polluting form of coal than the higher (black) grades of coal. JEAN-CLAUDE REVY, ISM/SCIENCE PHOTO LIBRARY
Pieces Lignite Brown Coal Mine Germany Stock Photo 699900052
Lignite Stock Photos, Royalty Free Lignite Images
3,053 Brown Coal Lignite Royalty-Free Images, Stock Photos & Pictures
Brown coal (lignite) - Stock Image - C008/4296 - Science Photo Library
Brown Coal Lignite Sedimentary Rock Formed Stock Photo 349913783
Brown Coal Images – Browse 44,340 Stock Photos, Vectors, and Video
Brown Coal Images – Browse 44,340 Stock Photos, Vectors, and Video
1,200+ Brown Coal Lignite Stock Photos, Pictures & Royalty-Free Images - iStock
3,053 Brown Coal Lignite Royalty-Free Images, Stock Photos & Pictures
1,200+ Brown Coal Lignite Stock Photos, Pictures & Royalty-Free Images - iStock
1,200+ Brown Coal Lignite Stock Photos, Pictures & Royalty-Free Images - iStock