Ключевые слова: abstract, anthracite, backdrop, background, bituminous, black, cairn, carbon, charcoal, close, closeup, coal, combustible, continuous, covering, dark, energy, environment, frame, fuel, full, hard, industrial, industry, macro, mineral, pattern, pile, power, repeat, repetition, resource, rock, rough, scroll, seamless, shining, shiny, solid, stack, stone, structure, texture, textured, tile, tiled, wallpaper,