Ключевые слова: belt, big, black, car, carbon, coal, coal mine, coal power plant, construction, earth, electric, electricity, energy, environment, environmental, excavator, fossil, fuel, geology, ground, industrial, industry, infrastructure, landscape, large, lignite, lines, machine, mine, miner, mineral, mountain, nature, pattern, pit, plant, pollution, power, quarry, railway, rock, smoke, station, steam, surface, technology, transportation, wheel, work,