Ключевые слова: air, atmosphere, background, blue, building, business, chemical, chemistry, chimney, climate, construction, dirty, ecology, emission, energy, engineering, environment, environmental, factory, fuel, fume, gas, global, heavy, industrial, manufacturing, metal, oil, petrochemical, pipe, pipeline, plant, pollution, power, production, refinery, sky, smog, smoke, smokestack, stack, station, steam, steel, structure, technology, tower, toxic, tube, warming,