Ключевые слова: air, architecture, atmosphere, blue, building, chemical, chimney, chimney stalk, clean, clear, construction, danger, ecological, ecology, electric, energy, environment, factory, flue, fuel, funnel, high, industrial, industry, light, manufacture, pipe, plant, pollution, power, production, ray, sky, smog, smoke, smokestack, stack, stalk, steam, stem, sun, sunset, tube, vertical, warming,