Ключевые слова: air, atmosphere, building, business, chemical, chimney, climate, cloud, coal, concept, construction, danger, dioxide, dirty, ecology, emission, energy, environment, exhaust, factory, fuel, fumes, gas, generation, global, industrial, manufacturing, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, snow, station, steam, technology, tower, toxic, vapor, warming,