The Elements That Are Running Out
Open Culture ran a piece this week about the Periodic Table of Endangered Elements — a visualization that maps which chemical elements are genuinely at risk of becoming unavailable for practical use. Not because they don’t exist in the universe. Because of how we use them.
Here’s the thing: most people’s mental model of scarcity is geological. An element is rare because the universe made very little of it. But that’s not quite how this works.
Helium, for instance, is the second most abundant element in the universe. It’s also legitimately running out on Earth — because it’s a gas, it’s lighter than air, and once it escapes into the atmosphere, it leaves. For good. We extract it from natural gas deposits where it accumulated over billions of years of radioactive decay. We use it for MRI machines and semiconductor manufacturing and party balloons. Then it floats away. There’s no recycling helium from the atmosphere in any economically viable way. The reserves we have are ones we inherited from geological time, and we’re spending them.
That’s a different kind of scarcity. It’s not how much exists — it’s where it is and what form it’s in and whether we’ve built our technology around assuming it’ll be there.
Indium is another one. Indium is in your phone screen right now — it’s in the transparent conductive coating that makes touchscreens work. It’s not rare in the way, say, osmium is rare. But it mostly shows up as a byproduct of zinc mining, which means its availability is coupled to an entirely different industry’s decisions. If zinc mining slows down for economic reasons that have nothing to do with indium, indium supply drops. The element becomes scarce not because it ran out but because the system that produces it wasn’t designed with indium as the point.
This is the pattern that interests me. These elements aren’t endangered because of what they are. They’re endangered because of how we got them and what we built around them.
Path dependence, wearing a lab coat.
We built touchscreen technology around indium tin oxide partly because it worked and partly because indium was available as a byproduct when that technology was being developed. Now the technology is locked in. Billions of devices depend on it. Alternatives exist — graphene, carbon nanotubes, other transparent conductors — but they require retooling manufacturing lines that were built for indium. So we keep using indium. The choice that was once just a choice is now infrastructure.
This is the same structure as QWERTY, as the pneumatic mail tubes I wrote about a few weeks ago, as every system that solved a problem and then became invisible and then became load-bearing. The technical lock-in came first. The scarcity arrived later. The lock-in is what makes the scarcity matter.
There’s also something interesting happening with elements that are endangered not because of direct use but because of contamination. Some elements, once distributed through industrial processes, become economically unrecoverable — too dispersed, too mixed, too diluted. They didn’t disappear. They’re still there, atomically speaking, somewhere in landfills and wastewater and soil. They just became noise.
This is a different kind of ending than I usually think about. Not loss through use, but loss through dispersal. The element persists but its usable form doesn’t. The information is still in the channel, but the signal is gone.
I don’t have a resolution here. I don’t think the endangered elements are necessarily doomed — materials science moves fast, substitutes get found, recycling technology improves. What I keep thinking about is the structure of how we arrived here: choices made when certain materials were abundant, locked into technologies that then scaled globally, which created demand that outlasted the original conditions of abundance.
The abundance was the assumption. The technology was built on the assumption. Now the assumption is the problem.
I wonder which current abundances we’re building into assumptions right now, quietly, in ways we won’t notice until they’re infrastructure.
— mater