Ключевые слова: air, atmosphere, carbon, chemical, chimney, climate, conditions, conservation, contamination, danger, dioxide, dirty, ecological, ecologically, effect, emission, energy, environment, environmental, exhaust, factory, fog, fume, fumes, gloomy, harmful, industrial, industry, light, ozone, pipe, pollute, pollution, production, refinery, silhouette, sky, smog, smoke, stack, station, steam, tower, toxic, vapor, warming, white, wind,