Ключевые слова: blue, business, chemical, chemistry, chimney, construction, dark, diesel, distillation, distillery, energy, engineering, environment, equipment, factory, fuel, gas, gasoline, heavy, industrial, light, manufacturing, metal, night, oil, petrochemical, petrol, petroleum, pipe, pipeline, plant, pollution, power, production, refinery, sky, smoke, smokestack, stack, station, steam, steel, sunset, tank, technology, tower, toxic, tube, twilight,