Ключевые слова: above, adult, anthracite, background, black, carbon, charcoal, closeup, coal, combustible, dark, deposits, ecology, energy, environment, extraction, fossil, fuel, geology, handful, hands, heap, heat, holding, industrial, industry, male, man, many, material, mine, mineral, mining, nature, person, piece, pieces, pile, power, production, resource, resources, rock, sedimentary, simple, stone, texture, top, view, work,