Ключевые слова: air, architecture, atmosphere, blue, building, chemical, chimney, chimneystalk, clouds, contamination, ecology, energy, environment, environmental, factory, factory chimney, fuel, fume, fumes, gas, global, heat, heavy, industrial, industry, manufacturing, ozone, petroleum, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, technology, toxic, vapor, warming, waste,