Our continuing global mineral needs must come from reserves and resources. Recall from Section 1 that the term “resources” refers to Earth’s entire inventory of the mineral of interest, whereas “reserves” refer to that part of the resources that have been identified and quantified and can be exploited economically. In general, reserves are of greater interest to producers and industrial consumers, who tend to look forward for only a few years or decades, while resources are of greater interest to governments and scientists who are concerned about long-term mineral supplies. Unlike reserves, as discussed in Section 3, there is no...

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