Ключевые слова: bituminous coal, black, black gold, carbon, carbon dioxide, coal, coal pile, coal structure, combustible, dark, deposits, energy, energy source, energy storage, exploitation, extraction, flashlight, fossil, fossil fuel, fuel, glow, hard, helmet, holds, in his hands, industrial, industry, light, lump, male, mine, miner, mineral, mining, night, palms, pollution, potential, raw material, rock, shale, shines, solid, squeezes, stone, unclean, underground, wealth, work clothes, worker,