Ключевые слова: architecture, autumn, background, beautiful, blue, building, business, cement, city, concrete, construction, danger, design, engineer, engineering, environment, equipment, fall, forest, foundation, green, high, industrial, industry, landscape, leaves, metal, natural, nature, old, outdoor, park, pattern, plant, platform, safety, scaffolding, season, site, sky, steel, structure, travel, tree, urban, white, work, worker, workers, yellow,