Ключевые слова: air, blast, building, business, chemical, chemistry, chimney, construction, dirty, ecology, energy, engineering, environment, equipment, factory, foundry, furnace, gas, heat, heavy, hot, industrial, industry, iron, manufacture, manufacturing, melting, metal, metallurgical, metallurgy, mill, petrochemical, pipe, plant, pollution, power, production, sky, smelting, smog, smoke, smokestack, stack, station, steam, steel, technology, tube, work,