Ключевые слова: air, building, chemical, chimney, climate, cloud, coal, construction, dirty, ecology, energy, environment, exhaust, factory, fuel, gas, global, industrial, industry, isolated, manufacturing, oil, petrochemical, petrol, petroleum, pipe, plant, pollution, power, refinery, sky, smog, smoke, smokestack, stack, station, steam, steel, technology, tower, toxic, warming, white,