Ruhr Area
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The Ruhr Area (German: Ruhrgebiet) is an urban area in North Rhine-Westphalia, Germany. Many of the cities in the Ruhrgebiet used to have a lot of heavy industry.
The Ruhr Area is bordered by the rivers Ruhr River to the south, Rhine River to the west, and Lippe to the north. Southwest it borders the Bergisches Land.
The area has about 5.3 million inhabitants, and is part of the larger Rhine-Ruhr metropolitan area of more than 12 million people.