[beefield]

We very rarely need specific minerals. We need energy, nutrition, conducting materials etc. Most of these needs we can fulfil with many different minerals. And the amlunt of all [1] minerals in earths crust is staggering compared to any foreseeable futre, so we are just going to flip to whatever is easiest/cheapest to dig. None will "run out" as in there is no more available, only that the remaining ones are too expensive to extract at the moment.

[1] Helium may be one of the exceptions here, but I would guess even that is produceable with some future nucleaf technology given enough money.

[SinParadise]

> We very rarely need specific minerals.

Because historically we do not have technology complex enough to need specific minerals. Now we do.

> Most of these needs we can fulfill with many different minerals. And the amount of all [1] minerals in earths crust is staggering compared to any foreseeable futre, so we are just going to flip to whatever is easiest/cheapest to dig.

There is another factor at play though: energy required to extract the minerals. Ones deeper in the earth's crust are likely more energy intensive to extract and perhaps even purify. At some point it won't be worth it.

[walleeee]

> None will "run out" as in there is no more available, only that the remaining ones are too expensive to extract at the moment.

Right, the issue is cost of extraction (in materials, energy, and externalities, the only real currencies), not exhaustion of the reserves. I think Simon would argue 1) that the degree to which the current economy depends on fossil resources (e.g. for metal-working; how do we reach the required temperatures without melting an electrically-powered heating element?) has not been grasped by policy-makers or the public, and 2) that we are already in energy decline, exacerbated by ongoing failure of ecosystem services. In other words, he thinks we have bled too much momentum and triggered too many blowbacks to "level off" at current living standards, if that were even a viable path forward (given the rate at which we are destroying the biological basis for human life, it is not).