The restrictions have increased more than five-fold in the last decade to a point where 10% of the global value of exports is subject to at least one measure, the OECD says.
US Critical Materials has said that rare earth samples from its flagship property in Southwest Montana reported grades that exceed any other domestic rare earth resource.
West Virginia University received a grant from the US Department of Energy to develop a pre-commercial demonstration facility for separating and refining rare earth elements from acid mine drainage and coal waste.