Multi‑quarry network vs single quarry model: UNDO partners with several quarries and mines to source silicate rock, which gives them flexibility of scale and supply resilience (Source: UNDO Carb0n).
Barclays deal is a milestone offtake: The agreement with Barclays for 6,538 t CO₂ marks a significant validation of ERW as a carbon removal route (Source: Carbon Herald)
Financing & credit structure innovation: UNDO uses structures combining debt, offtake contracts, and insurance to de‑risk scaling in the early years (Source: netzerocompare.com)
Co‑benefits: soil health, yield, farmer incentives: UNDO often provides crushed rock to farmers at subsidized or no cost, tying carbon removal to agricultural benefit (Source: UNDO Carbon)
Flour Yield is watching GreenFi & GreenTech: UNDO’s advances help validate the broader regenerative finance ecosystem in which FYT operates.
UNDO is a climate technology company focused on enhanced rock weathering (ERW). The basic concept: crush silicate rock (wollastonite, basalt, etc.), then spread it over farmland. The minerals in the rock react with atmospheric CO₂ (via rainfall and soil processes), converting it to stable bicarbonates that are carried to ocean sinks or mineralized in soils. Over geological timescales, this locks CO₂ away nearly permanently.
But UNDO is not just “spread rock and hope.” Their model includes:
Strict rock testing & selection: Quarries are analyzed for chemical composition, weathering potential, absence of harmful heavy metals, and logistical feasibility (Source: UNDO Carbon).
Partnering with multiple quarries/mines: Instead of relying on one site, they build a network of supply sources. This allows scaling, regional balancing, and supply security.
MRV & verification systems: They use multi‑proxy geochemical measurement (solid, aqueous, gas phases) and modelling to validate carbon removed. XPRIZE
Financial stacking & risk management: UNDO combines debt facilities, multi‑year offtakes (e.g. Barclays), and insurance to make the carbon removal business viable and bankable. netzerocompare.com+1
In September 2025, Barclays entered its first major carbon removal offtake agreement with UNDO, committing to 6,538 tonnes of CO₂ removal via ERW in Ontario. The project will involve spreading crushed silicate rock over ~10,000 acres of farmland as part of an Ontario deployment.
This is a landmark for two reasons:
Market validation: A global bank stepping into ERW gives credibility to the removal method.
Financial sophistication: Barclays is using a prefinancing structure to support UNDO’s operations ahead of credit issuance. This helps bridge capital needs vs cash flows during startup phases.
UNDO has already partnered with clients like Microsoft, British Airways, and others in prior ERW offtake deals (Source: businessgreen.com).
Quarry network vs single quarry
UNDO’s multi-quarry approach gives them flexibility, scale, and geographic diversity. Flour Yield currently relies on a single or limited quarry for sourcing silicate material, which constrains scale, supply risk, and regional coverage.
Supply resilience & segmentation
With multiple quarries, UNDO can deploy across regions and adjust to logistical constraints (transport cost, proximity to farmland, regulations). Flour Yield might consider diversifying supply in future to reduce bottlenecks.
Financial risk & scaling mechanisms
UNDO’s use of debt + offtake + insurance demonstrates a pathway for making carbon removal ventures attractive to institutional capital. FYT can monitor how these structures evolve, and adapt or partner accordingly.
Farmer incentives & co-benefits
UNDO often subsidizes or covers the cost of rock and spreading (farmers only pay trucking) in exchange for carbon credits. That alignment helps adoption and community buy-in. Flour Yield’s model could adopt similar incentives or rebates to strengthen farmer engagement.
This post underscores that Flour Yield is deeply monitoring the GreenTech / GreenFi frontier. UNDO’s momentum—networked quarry sourcing, financing sophistication, global offtake agreements—signals the direction in which high‑integrity carbon removal is heading. While Flour Yield currently operates with a more focused quarry model, we can draw inspiration on how to scale, diversify, and integrate finance into regenerative carbon projects. We believe future FYT innovations may well intersect with multi-source rock networks and institutional offtake frameworks, merging science, supply chain, and finance in our mission to catalyze decentralized carbon removal.
What if we could turn worn-out farmland into long-term carbon sinks — at scale? Enter UNDO, a Canadian climate-tech firm that just secured a major partnership with Barclays to remove over 6,500 t CO₂ via rock weathering. Here’s what they’re doing — and what Flour Yield is watching.
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