Ключевые слова: abstract, background, black, burning, carbon, charcoal, close, closeup, coal, combusted, dark, dirty, dust, earth, electricity, energy, environment, fossil, fragile, frame, fuel, full, fumes, furnace, heap, heat, industrial, industry, lump, lumps, metal, mine, mineral, old, ore, pattern, pieces, pile, pit, plant, power, resource, rock, shining, shiny, sizes, sulfur, technology, train, up,