Ключевые слова: air, atmosphere, blue, carbon, chemical, chimney, climate, clouds, coal, cooling, dioxide, ecology, emission, energy, environment, environmental, exhaust, factory, fuel, fumes, gas, global, heavy, industrial, pipe, plant, pollution, power, process, production, puff, refinery, sky, smog, smoke, stack, station, steam, technology, tower, toxic, tube, warming, water,