Ключевые слова: black, carbon, coal, coal mine, coal mining, construction, conveyor, depot, dig, dirt, dirty, dust, energy, engineering, equipment, excavation, factory, geology, heavy, industrial, industrialization, industry, iron, machine, machinery, manufacturing, material, metal, mine, mineral, mining, ore, plant, platform, pollution, power, processing, production, railway, raw materials, site, stacking, transport, transportation, work,