Ключевые слова: blue, business, chemical, chemistry, chimney, construction, dark, diesel, energy, engineer, engineering, environment, equipment, factory, fuel, gas, gasoline, global, heavy, industrial, industry, light, manufacturing, metal, night, oil, petrochemical, petroleum, pipe, pipeline, plant, pollute, pollution, power, production, refinery, sky, smoke, steam, steel, storage, structure, sunset, supply, tank, technology, tower, tube,