Ключевые слова: air, atmosphere, chemical, chemistry, chimney, climate, co2, coal, crisis, damage, dirty, ecology, energy, environment, environmental, factory, fuel, gas, generation, global, grunge, harmful, heavy, industrial, industrial waste, industry, nature, ozone, pipe, plant, pollute, pollution, power, sky, smog, smoke, smoke stack, smokestack, station, steam, tall, technology, tower, toxic, toxic smoke, urban, warming, waste, wind,