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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
Lignite (Brown Coal) - Geology Superstore
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13,225 Lignite Images, Stock Photos, 3D objects, & Vectors
13,225 Lignite Images, Stock Photos, 3D objects, & Vectors
1,200+ Brown Coal Lignite Stock Photos, Pictures & Royalty-Free Images - iStock
1,200+ Brown Coal Lignite Stock Photos, Pictures & Royalty-Free Images - iStock
13,225 Lignite Images, Stock Photos, 3D objects, & Vectors
Lignite coal isolated hi-res stock photography and images - Alamy
13,225 Lignite Images, Stock Photos, 3D objects, & Vectors