The '''Ruhr''' is a [[conurbation]] noted for heavy industrial production, situated in the western [[German]] state of [[Nord Rhein-Westfalen]]. Its industries include coal mining, iron and steel manufacture, and heavy engineering production. Major centres of the Ruhr include [[Bochum]], [[Dortmund]], [[Duisburg]], [[Essen]], and [[Gelsenkirchen]]. The conurbation has a population of 5.3 million. | The '''Ruhr''' is a [[conurbation]] noted for heavy industrial production, situated in the western [[German]] state of [[Nord Rhein-Westfalen]]. Its industries include coal mining, iron and steel manufacture, and heavy engineering production. Major centres of the Ruhr include [[Bochum]], [[Dortmund]], [[Duisburg]], [[Essen]], and [[Gelsenkirchen]]. The conurbation has a population of 5.3 million. |