I've always held the belief that mining is really a large-scale exercise in waste management (with the added benefit of gaining value from the ore being extracted!)...as natural ore deposits diminish in concentrations and we are having to dig deeper and deeper to access natural ore bodies, will we find a flipping point where recovery from man-made waste streams will become more economical than extracting from the earth?
I think so, and it will come sooner than we think!
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