> And, of course, rare metals are 100% recyclable. They aren't a resource we can use up, except by launching them on space probes or burning them in nuclear rea

> And, of course, rare metals are 100% recyclable. They aren't a resource we can use up, except by launching them on space probes or burning them in nuclear reactors. They can effectively be used up by being spread out over the world. A natural resource can only be mined in an affordable way if it is concentrated in one place, for example in the form of ore or an oil well.