Ключевые слова: air, atmosphere, carbon, change, chemical, chimney, climate, cloud, coal, cooling, crisis, danger, dioxide, dirty, dust, ecology, emission, energy, environment, environmental, exhaust, factory, fuel, fume, gas, generation, global, industrial, manufacturing, nuclear, ozone, pipe, plant, poison, pollute, pollution, power, production, sky, smog, smoke, smokestack, station, steam, technology, tower, toxic, vapor, warming,