Ключевые слова: abstract, activity, architecture, art, background, backgrounds, building, chemical, chimney, city, cityscape, cloud, concepts, conservation, contaminate, design, emissions, energy, environment, exterior, factory, generation, generator, grunge, icon, illustration, industrial, industry, landscape, manufacture, modern, moody, painting, pattern, pipe, plant, pollution, power, production, scene, silhouette, site, sky, skyline, smoke, stack, steam, structure, symbol, technology, tower, town, toxic, urban, working,