Ключевые слова: air, atmosphere, background, blue, building, chemical, chimney, climate, cloud, concept, construction, damage, dioxide, dirty, ecology, emission, energy, environment, environmental, exhaust, factory, fuel, fumes, gas, global, industrial, industry, manufacturing, nature, pipe, plant, pollution, power, production, refinery, sky, smog, smoke, smokestack, stack, station, steam, technology, tower, toxic, urban, vapor, warming, white,