Ключевые слова: air, atmosphere, blue, building, carbon, chimney, clear, contamination, damage, danger, dioxide, duct, ecology, emission, energy, environment, exhaust, factory, fumes, generation, high, industrial, industry, manufacturing, old, one, pipe, plant, pollute, pollution, power, production, single, sky, smoke, smokestack, stack, steam, technology, tower, toxic, tube, urban, vapor, warming, waste, white,