Ключевые слова: air, amusement, building, business, chemical, chimney, city, ecology, energy, environment, equipment, evening, factory, ferris, foundry, furnace, heavy, holiday, industrial, industry, iron, manufacture, manufacturing, metal, metallurgical, metallurgy, mill, park, people, petrochemical, pipe, plant, pollutant, pollution, power, production, sky, smog, smoke, smokestack, stack, station, steel, summer, sunlight, sunset, technology, tree, tube, wheel,