Ключевые слова: air, atmosphere, background, building, change, chemical, chimney, city, climate, coal, concept, condensation, cooling, damage, dirty, ecology, energy, environment, environmental, factory, fuel, garbage, generation, global, industrial, industry, nature, overcast, pipe, plant, plastic, pollution, power, protection, refinery, sky, smog, smoke, station, steam, technology, tower, toxic, trash, vapor, view, warming, waste, water,