`Mesabi Range iron ore depletion`
Appears in 1 lecture.
Appearances across the corpus
Counter-example to copper — Mesabi Range and Indian iron ores were ~40% iron, near the theoretical max for pure iron oxide. Steel doesn't have the entropy problem copper does.
The simple answer is, we've already mined out our best ores. Whereas steel ores — what they have in India or what we had in the Mesabi Range — were like forty percent iron. You can't get more than that; pure iron oxide is forty percent iron if you don't have any other impurities. Aluminum — Sam's not here today, Sam works for Novelis aluminum — the ore is...