Ключевые слова: air, background, building, business, chemical, chimney, city, cloud, concept, construction, contamination, danger, design, dirty, eco, ecological, electricity, emission, energy, environment, environmental, factory, flat, fog, fuel, fume, gas, global, illustration, industrial, landscape, manufacturing, nature, nuclear, pipe, plant, pollution, power, production, sky, smog, smoke, station, steam, technology, tower, toxic, urban, warming, water,