Ключевые слова: air, atmosphere, blue, building, carbon, chemical, chimney, climate, cloud, coal, danger, dioxide, dirty, ecology, electricity, emission, energy, environment, environmental, exhaust, factory, fog, fuel, fumes, gas, generation, global, heat, industrial, manufacturing, nature, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, smokestack, stack, station, steam, technology, tower, toxic, urban, vapor, warming,