Ключевые слова: air, architecture, blue, chemical, chemistry, chimney, clear, climate, cloud, complex, dioxide, dirty, ecology, energy, environment, environmental, europe, exhaust, exterior, factory, fuel, gas, global, heating, high, industrial, industry, metal, nature, pipe, plant, pollution, power, production, red, refinery, sky, stack, system, technology, tower, tube, urban, warming, white,