With a population density of 2,800/km2 and a population of over 5 million (2017), it is the largest urban area in Germany. It consists of several large cities ...
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The Ruhr (German Ruhrgebiet) is an urban and industrial area in North Rhine-Westphalia, Germany. It may also refer to: Ruhr (river), a river that runs ...
.ruhr is a geographic top-level domain for the Ruhr area in Germany in the Domain Name System of the Internet. It launched in 2013.