CDR Week and notes

CDR Daily Digest — 2026-04-29

Mining waste, market concentration, and the feedstock question Today’s stories cluster around one uncomfortable truth: the CDR market is still defined by who buys, not what works. Microsoft’s pause has revealed that a single buyer drove roughly 80% of durable demand. Meanwhile, the supply side keeps innovating on feedstocks and certification, building infrastructure for a market that does not yet have enough customers. This is the gap CDR has to close in 2026. Technology readiness is running ahead of demand depth. ...

Verde & Isometric Launch New Carbon Credit Category—Pathway Unspecified

Carbon Herald just published Verde And Isometric To Commercialize A New Category Of Carbon Credits. Carbon Herald reports that Verde Resources has signed a strategic partnership with Isometric to commercialize what the companies describe as a new category of carbon credits. Isometric operates as a carbon removal registry focused on scientific rigor in measurement and verification, while Verde Resources develops nature-based and engineered removal projects. The collaboration is positioned as a step toward expanding the menu of credit types available to corporate buyers, though the article frames the announcement around the partners’ intent to standardize methodology and issuance for the new category. Specific issuance volumes, pricing, and buyer commitments are not detailed in the recap. ...

Microsoft pause exposes CDR market: one buyer drove 80% of demand

Heatmap News just published Carbon Removal After Microsoft. Heatmap News reports that Microsoft, by far the largest buyer of carbon removal credits, has informed suppliers it is pausing new purchases. The company bought more than 70 million tons of CDR credits in recent years, including 45 million tons last year alone, dwarfing the next largest buyer Frontier at 1.8 million tons total since 2022. Microsoft says the pause is not permanent and that its 2030 carbon negative goal remains in place, framing the change as a pacing adjustment. Industry analysts quoted in the piece say many CDR startups built business models that effectively assumed Microsoft would be the backstop buyer, and a pullback removes roughly 80% of annual demand. ...

DNV named Independent Certifier for Northern Endurance CO2 pipeline

Carbon Herald just published NEP Taps DNV For CO2 Transport Certification. Carbon Herald reports that DNV has been selected as Independent Certifier for the Northern Endurance Partnership (NEP), the joint venture handling CO2 transport and storage for the East Coast Cluster in the UK. In this role, DNV will provide independent verification of the design, construction, and operational readiness of NEP’s CO2 transport infrastructure, which is intended to move captured emissions from industrial sites in Teesside and Humber to offshore storage in the North Sea. The certification work is positioned as a step toward delivering one of the UK’s first large-scale CCS networks under the government’s cluster sequencing program. ...

Biochar dominates CDR with 377 of 970 companies

Each dot on this scatter is a single CDR pathway - direct air capture, enhanced rock weathering, biochar, ocean alkalinity, mineralization, and the rest. The horizontal axis counts how many companies are working that pathway; the vertical axis sums the employees across those companies. Linear scales on both, so distance on the page matches distance in the numbers. What this view reveals that a headcount table cannot is the shape of the industry. A pathway sitting high and to the right is crowded with firms and staffed deeply. One sitting high but to the left is a pathway dominated by a few large companies. Low and to the right means many small teams chasing the same idea. The spread between these corners is the story of where capital and talent have actually landed, versus where the field is still a cottage. ...

Captain's CDR Log #119: Mining waste is becoming the feedstock layer durable CDR has been waiting for

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. ...

CDR Daily Digest — 2026-04-28

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's continuous CO2-to-concrete demo plant goes live in Erkrath

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. ...

Offtake Diligence Is Now a Continuous Process, Not a One-Time Check

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. ...

UK Carbon Credit Market Hits $1.6B—But Global Lead at Risk

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. ...