Ключевые слова: air, architecture, blue, building, business, chemical, chemistry, chimney, coal, construction, dark, dusk, ecology, electricity, emission, energy, engineering, environment, environmental, evening, exterior, factory, fuel, gas, global, heavy, industrial, landscape, manufacturing, metal, night, oil, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, station, steam, steel, structure, sunset, technology, tower, tube, warming,