Ключевые слова: bituminous, black, burning, central heating, coal, coal power plant, cube, dark, deposits, dirty, ecology, effect, energy, environment, extract, extraction, flip, fuel, gas, heat, hot, industry, lignite, load, loading, manufacturing, material, metallurgical, mine, miner, mineral, mines, nature, pile, power, resources, shovel, station, stone, tiled, unclean, winter, worker,