Ключевые слова: architecture, area, background, balloon, banner, building, business, chimney, city, clear, color, concept, construction, design, eco, ecology, energy, engineer, environment, equipment, factory, graphic, green, hill, idea, illustration, industrial, landscape, line, manufactory, modern, mountain, outline, pipe, plant, production, quality, recycle, silhouette, station, style, technology, thin, tower, town, tree, unusual, urban, white,