Alan Hill

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“There are three different permits required for transporting ore. The price depends on how much ore is being transported and the distance it is transported. Négociants must pay something like eighty or one hundred dollars per year to transport one ton of ore no more than ten kilometers. A comptoir will have to transport many tons of ore, and maybe the distances could be up to fifty kilometers.
Cobalt Red: How the Blood of the Congo Powers Our Lives
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