What two conditions have helped to make the Ruhr River Valley of West Germany one greatest industrial regions world?

1. Rich coal deposits. The Ruhr River Valley is home to some of the world's largest coal deposits. This coal has been used to power the region's industries for centuries.

2. Excellent transportation links. The Ruhr River Valley is located at the crossroads of several major trade routes. This has made it easy for the region's industries to ship their products to markets around the world.