Ключевые слова: air, architecture, background, building, business, chemical, chimney, city, cityscape, construction, downtown, drilling, ecology, energy, environment, environmental, equipment, evening, factory, financial, fuel, gas, global, industrial, industry, landscape, light, manufacturing, modern, oil, pipe, plant, pollution, power, scene, sky, skyline, smog, smoke, smokestack, steam, sun, sunset, technology, tower, travel, urban, view, warming,