Ключевые слова: arc, arched, architecture, blue, bolt, building exterior, built structure, celling, concrete, conservation, construction, dirt, disposal plant, environment, environmental damage, environmental protection, garbage, girder, industry, iron, koelliken, landfill, landfill perimeter, manipulation hall, metal, metal industry, moderne architektur, nature conservation, outdoors, poisonous organism, pollution, recycling, roof beam, sky, special waste landfill, steel, steel cable, steel element, steel structure, switzerland, toxic waste, warehouse, water pollution,