As Paul suggests, eventually magnets will be made from synthetic materials, just as we now have fabric (e.g. polyester) made from synthetic materials. We won't have to rely on rare earth elements.
Harry Jed Rothwell wrote: > Terry Blanton wrote: > >> But magnets will NOT save the world. Consider this: >> >> There are known recoverable reserves of Rare Earth Elements in the >> entire world of approximately 6 million metric tons. . . . > > There is not much in ocean water, either: 3.3 ng/kg. More than Pd or > Au, but not enough to extract by any practical means. It is about the > same as Ag. See: >
