Ключевые слова: air, building, chemical, chimney, city, climate, cloud, coal, construction, dirty, ecology, electricity, emission, energy, environment, environmental, factory, fuel, fume, gas, global, heavy, industrial, landscape, metal, nature, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, smokestack, station, steam, technology, tower, toxic, urban, vapor, warming, white,