Ключевые слова: anthracite, background, bitumen, bituminous, black, black diamond coal, blind coal, burn, carbon, charcoal, clean, coal, coalification, coffee coal, collection, dirty, energy, environment, extract, fossil, fractured, fuel, heat, industrial, industry, manufacturing, material, metallurgical, mine, mineral, mining, natural, nugget, ore, pollution, power, production, raw, resource, resources, rock, shale, stone, structure, texture, underground,