18 An update and even a rough estimate of the total global potential of these already discovered resources would require a substantial amount of work, not to mention the ‘guesstimate’ of hypothetical resources in presently undiscovered deposits. No doubt this work, which until recently has been neglected because of the low phosphate prices, will need considerable effort in the near future. Nevertheless, it is clear that at the current phosphate prices of 50 to 100 US$ per ton, tens of billions of tons could be added to our phosphate reserve base. Pagina 27

Pagina 29

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