Ключевые слова: background, black, burning, central, charcoal, closeup, coal, cube, dark, dirt, dirty, ecology, effect, energy, environment, exploitation, extract, extraction, fossil, fuel, gas, geology, hand, hands, heat, hold, holding, human, industrial, industry, man, manufacturing, material, men at work, metallurgical, mine, miner, mineral, miners, mining, nature, person, power, processing, production, resource, rock, stone, underground, work,