Ключевые слова: air, building, business, chemical, chimney, city, construction, danger, dawn, dirty, ecological, ecology, energy, environment, environmental, factory, fuel, gas, global, heavy, industrial, industry, landscape, manufacture, manufacturing, metallurgy, pipe, plant, pollution, power, silhouette, sky, smog, smoke, smokestack, stack, station, steam, steel, sun, sunlight, sunrise, sunset, technology, tower, toxic, urban, view, warming, winter,