Ключевые слова: air, atmosphere, background, blue, breathe, building, carboxylic, chemical, chemistry, chimney, climate, cloud, cloudy, condensation, contamination, damage, danger, dioxide, dirty, ecology, economy, emission, emissions, energy, environment, environmental, exhaust, factory, fog, fossil, fuel, fumes, gasl, global, globally, heat, heating, high, industrial, industry, isolated, law, manufacturing, nature, ozone, pipe, plans, poison, poisoning, pollute, polluting, pollution, power, production, refinery, skyine, smell, smog, smoke, smokestack, stack, stationr, steam, substance, technology, tower, toxic, vapor, warming, waste, white,