Ключевые слова: air, architecture, atmosphere, blue, building, carbon, change, chemical, chimney, city, climate, cloud, concept, construction, danger, dioxide, dirty, disaster, ecology, emission, energy, environment, environmental, equipment, factory, fumes, gas, global, green, industrial, nature, oil, pipe, plant, pollution, power, production, refinery, silhouette, sky, smog, smoke, steam, structure, symbol, technology, tower, town, toxic, warming,