Ключевые слова: air, ash, atmosphere, blue, carbon, chemical, chimney, chimneys, city, climate, cloud, clouds, cloudy, coal, dioxide, dirty, ecology, emissions, emissions of industrial waste, energy, environment, environmental, environmental pollution, exhaust, factory, fuel, fumes, fuming, gas, global, heaven, industrial, industry, nature, petrochemical production, pipe, pollution, production, sky, smog, smoke, steam, technology, tower, toxic, weather,