KnowraRuhrLinked fromLinked fromThe 12 pages that link to Ruhr, each with the reason it gives.All 12Broader topic 3Related 5Narrower topic 4North Rhine-WestphaliaBroader topic: The Ruhr forms the state's largest industrial and metropolitan region.ConurbationBroader topic: Its former industrial towns grew into a continuous urban landscape.Rhine-Ruhr metropolitan regionBroader topic: The Ruhr forms the metropolitan region’s industrial and urban core.