One of the most exceptional mining complexes in French Alsace, where potassium or potash was brought to the surface, is the Carreau Rodolphe.
Artificial fertilisers were used from the nineteenth century onwards. Fertilisers contain nitrogen, phosphorus, potassium, calcium, sulphur and magnesium, among others.
One of the most exceptional mining complexes in French Alsace, where potassium or potash was brought to the surface, is the Carreau Rodolphe.
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In the early nineteenth century, the industrial revolution swept across continental Europe and one steelworks after another rose from the ground. Europe had hundreds of blast furnaces, but since the mid-twentieth century, Europe's steel industry has been slowly going downhill.
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