Ключевые слова: africa, background, black, burning, central, charcoal, coal, cube, dark, dirty, ecology, effect, energy, environment, exploitation, extract, extraction, fire, fossil, fuel, hand, heat, hold, hot, human, industrial, industry, lignite, man, manufacturing, material, metallurgical, mine, miner, mineral, mining, nature, power, processing, production, protection, resources, rock, source, stone, top, underground, work, worker,