Ключевые слова: air, art, background, building, bw business, carbon, chemical, chemistry, chimney, city, climate, construction, danger, dioxide, ecology, electricity, energy, environment, environmental, factory, fog, fuel, fume, gas, generation, global, global warming, heavy, industry, light, nature, ozone, pipe, pollution, power, scene, silhouette, sky, smog, smoke, station, steam, sun, technology, tower, toxic, tube, urban, warming,