Ключевые слова: air, background, blue, brume, carbon, chemistry, chimney, chimneystack, closeup, contamination, content, cooling, damage, danger, defilement, duct, emissions, environment, factory, fog, fume, funnel, high, impurity, industry, mist, pipe, pollution, products, reek, refuse, sky, smog, smoke, smokestack, soot, stack, steam, tailings, toxic, trumpet,