Ключевые слова: architecture, blue, building, chemical, chimney, combined, construction, cycle, dusk, electric, electrical, electricity, energy, engineering, environment, environmental, factory, gas, generator, industrial, industry, infrastructure, light, manufacturing, metal, oil, petrochemical, pipe, pipeline, plant, pollution, power, production, refinery, sky, smoke, station, steam, structure, sunset, technology, tower, turbine, twilight, voltage,