Ruhr

The Ruhr German: Ruhrgebiet (http://www.ruhrgebiet.de/) is a region in North Rhine-Westphalia, Germany. The region was formed during the 20th century by Montan industry coal and steel and runs currently through a structural transformation which makes it to one of the most dynamic regions in Europe. Its extension is limited by the Ruhr in the south, the Lippe in the north, the Rhine in the west and the city of Hamm in the east. That makes about 100 km from west to east and about 40 km from north to south. About 5.3 million people live in the Ruhr, which after London and Paris makes it the third largest metropolitan region in Western Europe.