Ключевые слова: air, atmosphere, burning, chimney, city, cityscape, climate, concept, dirty, dusk, ecology, emission, emit, energy, environment, environmental, factory, fuel, gases, global, industrial, industry, landscape, light, little, morning, pipe, planet, pollution, polution, power, production, refinery, silhouette, sky, smog, smoke, smokestack, steam, sun, sunlight, sunrise, sunset, technology, tiny, toxic, twilight, urban, vapor, view,