Ключевые слова: abstract, black, coal, cobblestone, crushing, dark, dig, dirty, dry, drying, dust, energy, environment, flammable, fossil, fossil fuel, fragments, fuel, gravel, gray, heat, indicator, industrial, industry, iron, isolated, material, metal, mine, mining, of wealth, old, outdoors, pollution, powder, process, resource, rusty, spade, stock, stone, stones, storage, surface, texture, tool, warehouse, wood, work, worker,