Ключевые слова: air, atmosphere, blue, building, business, carbon, chemical, chimney, city, climate, cloud, co2, cold, damage, danger, dioxide, dirty, ecological, ecology, energy, environment, environmental, factory, fog, foggy, fuel, fumes, gas, global, industrial, industry, manufacturing, nature, outdoor, ozone, park, pipe, plant, pollution, power, sky, smog, smoke, station, steam, technology, tower, toxic, warming, white,