Ключевые слова: background, black, burning, burnt, coal, cost, cube, dark, deposit, dirt, dirty, ecology, effect, energy, engineering, environment, exploitation, extract, fire, fossil, fuel, gas, hand, heat, hold, hot, human, industrial, industry, lignite, machine, machinery, man, manufacturing, material, mine, miner, mineral, nature, palm, person, power, production, resources, smoke, stone, textured, wealth, work, worker,