Ключевые слова: air, atmosphere, blue, building, carbon, chemical, chimney, climate, cloud, co2, coal, contamination, damage, danger, dioxide, dirty, ecology, emission, emissions, energy, environment, environmental, exhaust, factory, fuel, fume, gas, global, global warming, industrial, industry, manufacturing, pipe, plant, pollution, power, production, sky, smog, smoke, smokestack, station, steam, technology, tower, toxic, warming, waste, white,