Ключевые слова: background, blue, building, business, carbon, chemical, chemistry, chimney, complex, construction, energy, engineering, environment, environmental, equipment, facility, factory, fuel, gas, global, heavy, industrial, industry, light, machine, manufacturing, metal, natural gas, night, oil, petrochemical, petroleum, pipe, pipeline, plant, pollution, power, production, refinery, silver, sky, station, steel, structure, sunset, supply, tank, technology, tower, tube,