Piauí Negocios: Canadian mining company expands its area in Piauí and reinforces its commitment to rare earth elements. Mineradora do Canadá amplia área no Piauí e reforça aposta em terras raras CNN Brasil: Canadians are targeting rare earth deposits in Piauí, and the government wants mapping done in the state. Canadenses miram terras raras no Piauí e governo quer mapeamento no estado
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