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Raw Materials, entitled Critical Raw Materials for the EU, specified the degree of
criticality of metals and certain materials, based on their economic importance and
the risks of supply shortage. This resulted in a list of elements similar to the list
established by the United States, in particular for elements such as platinum, rare
earths, indium, tantalum and niobium.
Fig. 3.2  Criticality matrix designed by the US Department of Energy for metals related to energy,
with a short and medium term vision. (Source: US Department of Energy)
3 Rare and Strategic Metals