Ключевые слова: air, atmosphere, chemical, chimney, city, contamination, dirty, ecology, emissions, energy, environment, environmental, exhaust, factory, fog, fuel, fume, gas, global, heavy, industrial, industry, metallurgical, nature, pipe, plant, pollution, power, production, sky, smog, smoke, smokestack, stack, steam, technology, tower, tube, warming, white, winter,