The Ruhr is the centre of Germany's manufacturing industry but much has changed since it developed in the 30s. Watch this video to find out more.
The Ruhr is a heavily industrialised area of western Germany.
It developed industrially to supply arms for Germany in the 30s and 40s. Canals and rivers were used for transport and power. Resources of coal, iron ore and limestone helped the iron and steel industry develop.
In the 1970s, the area began to decline and a lot of the original raw materials are now exhausted.
New companies have moved in as electronics become more important.
Cheap land on the edge of towns is a good location for them to build science and business parks.
However, workers want houses nearby and the demand puts pressure on green belt land and increases house prices.
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