petroleum?

in what sense is petroleum similar to metallic resources such as copper ore?

One Response to “petroleum?”

  1. Brian T Says:

    Therre is a limited amount of it and like the copper ore there is more than we can easily or economically get at. As the recent price with copper (jacked up by the war and a big strike) shows, at the higher price, older mines with harder to get at copper are re-opened,

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