Ключевые слова: black, burning, central, coal, concept, dark, deposit, ecology, effect, energy, environment, exploitation, extract, extraction, fossil, fuel, gas, hand, heat, hold, hot, human, industry, lignite, man, manufacturing, material, metallurgical, miner, mineral, mining, nature, part, power, processing, production, protection, resourses, rock, source, station, stone, sunlit, underground, work, worker,