Ключевые слова: abstract, background, bituminous, black, burning, central, central heating, clean, coal, companies, cost, cube, dark, deposit, dirty, effect, energy, environment, exploitation, extract, extraction, fire, fuel, gas, heat, hot, industry, lignite, macro, manufacturing, material, metallurgical, mine, miner, mineral, nature, pictures, power, power station, prices, resources, smoke, stone, stove, texture, textured, tiled, types, unclean, winter,