Ключевые слова: air, burning, carbon, carbon dioxide, chemical, chimney, city, climate, dioxide, dirty, ecology, emission, energy, environment, environmental, evaporation, exhaust, factory, fuel, fume, gas, generation, global, globalwarming, greenhouse, heating, heavy, hedgehog, industrial, industry, manufacturing, plant, pollute, pollution, power, power station, production, sky, smog, smoke, stack, station, steam, sunrise, sunshine, technology, tower, tree, vapor,