Ключевые слова: air, atmosphere, blue, carbon, chemical, chimney, climate, cloud, coal, condensation, construction, damage, danger, dioxide, dirty, ecology, energy, environment, environmental, exhaust, factory, fog, fuel, fumes, gas, global, industrial, industry, nature, pipe, plant, pollution, power, refinery, silhouette, sky, smog, smoke, stack, station, steam, substance, sunset, technology, tower, toxic, warming, water, white, winter,