These pioneering ideas are a glimpse at how 'mining' can adapt into recovering, recirculating and even creating new minerals in place, rather than carving scars into the landscape.
The demand for critical materials and minerals is only accelerating with the rise of technology. But there is innovation aplenty when it comes to new ways of sourcing these necessary materials – by first looking at what we’ve already extracted, or thrown away, and finding what nature can replenish with minimal harm.
1. Urban mining: turning cities into ore bodies
In Antwerp, Umicore captures the precious metals found in e-waste, and industrial scraps, which are smelted and refined back into gold, silver, palladium and copper – all without opening a new pit. It’s a reminder that value is already circulating in our devices and infrastructure, and the next phase of innovation needs to build systems to recycle it.
2. Post consumer glass for cleaner concrete
Concrete’s carbon burden lives largely in its cement. Urban Mining Industries diverts post-consumer glass from landfill and mills it into Pozzotive®, a ground-glass pozzolan that substitutes for a substantial share of cement in the mix. On marquee projects – including JPMorgan’s 270 Park Avenue headquarters – the approach has helped cut embodied carbon at scale.
3. Turning dust into value
Across old mine sites, vast mounds of tailings –the finely ground waste material from mining and ore processing, which mostly consists of rock and a small amount of valuable minerals – can be reframed as a latent resource.
As reported by MIT, Phoenix Tailings is developing refining routes that pull rare earths and other critical metals from this waste with a low-toxicity, near-zero-waste ambition. Recent backing suggests industry is paying attention.
Elsewhere, Enhanced Rock Weathering spreads finely ground basalt on farmland, where it reacts with CO₂ and can improve soils. A 2024 PLOS ONE paper reported first-year yield and pH benefits in UK trials.
Start-ups Lithos and UNDO are scaling with careful monitoring and third-party purchasing via Frontier Reviews, which are continuing to probe long-term efficacy and safeguards (ScienceDirect).
4. Industrial symbiosis as resource strategy
In Kalundborg, Denmark, a network of 17 partners pipe steam, water, gypsum and other by-products between plants, creating a living metabolism where one firm’s residue becomes another’s input. The Kalundborg Symbiosis has created a system of mining flows – proof that with shared networks and trust, you can shrink waste and emissions while strengthening local industry.
5. Locking carbon into stone – inside the concrete itself
Rather than treat carbon as waste, some innovators are finding ways to work with it as an ingredient. Blue Planet Systems converts captured CO₂ into synthetic limestone aggregate for concrete, enabling placements that claim net-zero embodied carbon in the slab, as reported in the BBC.
Another company, CarbonCure injects CO₂ into fresh concrete where it mineralises, boosting strength and allowing less cement – and is now partnering with direct-air-capture providers to store atmospheric CO₂ in everyday builds.
6. Lithium from geothermal brines
Lithium is a critical mineral for the batteries that power our devices and EVs, in many ways it’s the marrow of the world’s electric future – so how we obtain it matters immensely. Reuters reports that Vulcan Energy is set to extract lithium from hot brines in Germany’s Upper Rhine Valley, while generating renewable heat and power in the process, a footprint far lighter than open-cut mining.
Similarly, in Cornwall, Cornish Lithium has secured planning consent for the UK’s first commercial geothermal-lithium facility, edging closer to domestic supply.
7. Batteries that live twice (and then again)
Start-ups are finding ways to give batteries a second life. For instance, Redwood Materials is assembling second-life battery systems for microgrids, then recycling them at end-of-life. It essentially gives another bite of the cherry for a product that the world will need more of. Read more via The Verge.
Why does any of this matter?
Taken together, these varying, experimental and ground-breaking pathways reframe resources as cycles and systems, rather than one-way trips – recovering metals already at hand, stitching industrial by-products into local symbioses, mineralising carbon where we build, and drawing essential elements from gentler sources. It’s a new era for mining in a way that’s more compatible with a regenerative economy.
