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Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The rock-based carbon removal pathway has quietly stopped being a science project and started being a mining-industry pivot. Three announcements in three weeks, on three continents, all point to the same insight: tailings piles are the new feedstock asset class for durable CDR. Start with Quebec. The Quebec Surficial Mineralization Hub launched with Frontier backing, and the framing is what matters. Frontier called Quebec’s industrial legacy, meaning its mining tailings, “one of the world’s biggest carbon removal opportunities.” Liability becomes feedstock. The throughput numbers are not small either. “Not spreading, either aerating large piles or using reactors. You do end up getting more mass at the end than you dig up due to carbonation, but we still expect on the order of >30k tons CO2 stored per acre.” - Zeke Hausfather (@hausfath.bsky.social on Bluesky). Per-acre density at that level is what separates a serious feedstock thesis from a boutique demo. ...

The UK is trying to corner CDR finance. The plants are showing up to match. Today’s stories line up around one country. The UK posted a $1.6 billion voluntary carbon market, the City of London made the case for scaling it further, and Wiltshire became home to what will be the country’s largest biochar carbon-removal facility. Meanwhile in Germany, a CO2-to-concrete demo went live, and a separate piece argued that buyers can no longer treat offtake diligence as a one-and-done check. The pattern: CDR is moving from pilot announcements to operating plants, and the financial plumbing around them is getting more demanding. ...

Co-reactive, a German startup turning industrial mineral waste into building materials, has switched on its demonstration plant in Erkrath. The facility runs a continuous process that combines CO₂ with mineral by-products to make carbon-negative construction materials, marking the company’s jump from bench chemistry to operating hardware. Why this matters Concrete and cement account for roughly 8% of global CO₂ emissions, and almost every mineralization startup claims it can fix part of that. Very few have moved past the lab. A working demo plant with a continuous process, not a batch reactor, is the step where most carbon mineralization companies stall. It is the difference between a chemistry result and a product you can sell. Mineralization also has a structural advantage over many other CDR pathways: the CO₂ is locked into a stable carbonate inside a material people already buy in enormous volumes. Verification is comparatively straightforward, and the product replaces a high-emission incumbent rather than requiring a new market. ...

Carbon Herald just published Ongoing Dilligence: Chasing Offtake In Carbon Removal Today. In a contributed piece on Carbon Herald, David LaGreca, managing director of Carbon Markets at EcoEngineers, walks through the offtake landscape facing carbon dioxide removal projects. The article frames offtake as an ongoing diligence exercise rather than a one-time deal, looking at how developers approach buyers, structure contracts, and manage delivery risk. It speaks to the practical challenges of moving CDR projects from announcement to revenue, including buyer expectations, verification readiness, and the gap between letters of intent and binding purchase agreements. The framing reflects an advisor’s view of where the friction sits between sellers and corporate purchasers in the current market. ...

Carbon Herald just published UK Carbon Credit Economy Worth $1.6B, But Lead Is Not Guaranteed, New Report Warns. Carbon Herald reports that the UK currently generates more than £1.2 billion (over $1.6 billion) per year from carbon credit markets, supporting jobs and economic activity tied to both compliance and voluntary schemes. The report cited in the article highlights the UK’s existing infrastructure, financial services depth, and regulatory experience as factors behind its current standing. However, it cautions that this lead is not guaranteed, with other jurisdictions building competing market frameworks and attracting capital. The piece points to the need for clearer policy signals and continued investment to sustain the UK’s position in voluntary and compliance carbon markets. ...

The Single Buyer Problem Is Now Impossible to Ignore Today’s stories share a common thread: CDR is bumping into the limits of its current shape. Carbon pricing covers most of the world economy on paper but barely moves emissions. Public money is starting to fill gaps that private buyers cannot. And one company stepping back from the market sent a tremor through the entire industry. The question is no longer whether CDR can scale technically. It is whether the buyer base, the policy scaffolding, and the financing pipes can carry the weight. ...

Carbon Herald just published 63% Of Global GDP Now Operates Under Carbon Pricing Systems. Carbon Herald summarizes findings from the International Carbon Action Partnership (ICAP) Status Report, which tracks the global expansion of emissions trading systems and other carbon pricing mechanisms. According to the piece, jurisdictions representing 63% of global GDP now operate under some form of carbon pricing, marking a phase of institutional maturity for these markets. The report points to continued expansion in coverage, with established systems deepening and new ones emerging across regions. The article frames this as evidence that emissions trading is moving from a niche policy tool toward a mainstream feature of climate governance, though specific prices, sectoral coverage, and enforcement strength still vary widely between jurisdictions. ...

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. While CDR Twitter argued about Microsoft’s procurement pause and Verra methodology fights, climate scientists were having a louder week. The physical signal got worse, the political ceiling got higher, and the people who study this for a living are not whispering. Here is what they said. “The new ‘Indicators of Global Climate Change 2025’ preprint (Forster et al.) shows a tripling of Earth’s Energy Imbalance relative to 1976-1995, using a IPCC AR6 methodology!” ...

When the biggest buyer leaves the room Microsoft has paused new CDR purchases. That single move pulls roughly 90% of demand out of the voluntary carbon removal market. Today’s other stories make more sense once you hold that fact in your head: a market that grew up around one buyer is now being asked to grow up, fast. The demand shock Microsoft’s pause is not a minor reshuffling. The company has been the anchor buyer for durable removals across DAC, biomass with carbon capture and storage (BECCS), enhanced rock weathering (ERW), and marine pathways. Suppliers built roadmaps around its offtakes. With those new contracts on hold, every developer with a 2027 or 2028 delivery date is now reworking their financing assumptions. ...

Microsoft has paused all new carbon removal credit purchases, with no public timeline for resumption. According to a Substack analysis by MAATTR, the company that represented roughly 90% of all carbon removal credit buying globally, and contracted more than 72 million tonnes over three years, told its CDR partners about the pause two weeks before the post was written. The official line from a spokesperson was the corporate non-answer: “We continually review and assess our carbon removal portfolio along with market conditions.” ...