Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The forecast Within the next 180 days, at least one major CDR registry will either publish a methodology amendment addressing humidity-swing and water-managed DAC sorbents, or issue an explicit deferral notice acknowledging the gap. The forcing function is a new arXiv preprint, Vacuum Moisture Swing Direct Air Capture: A Low-Thermal, Water-Managed Pathway, which reframes the binding constraint of air capture from regeneration heat to water activity. Current DAC accounting frameworks, including Isometric DAC Protocol v1.3, were engineered around thermal or electrical regeneration energy. They do not separately quantify or audit water as a parasitic load or as a lifecycle input. That mismatch is now visible, and the first non-thermal sorbent project seeking issuance will surface it. ...

This chart is a stacked bar count of every company in the CDR Directory, grouped along the x-axis by removal pathway (direct air capture, enhanced weathering, biochar, ocean alkalinity, and so on), with each bar segmented by business focus: pure-play producers, brokers and marketplaces, and firms where CDR is a side business bolted onto a different core model. The total height tells you which pathways are crowded with company formation. The segment mix tells you something a raw count hides: whether a pathway’s apparent size is built on operators actually delivering tonnes, on intermediaries reselling them, or on incumbents whose CDR line is a minor adjunct. Two pathways with identical totals can have very different underlying economies once you see the split. ...

Carbon Herald just published Airlines’ Carbon Tab Could Reach $127B Under Tightening Global Offset Rules. Carbon Herald reports that international airlines may collectively owe as much as $127B in carbon compliance costs from 2024 through 2035 as global offset requirements tighten. The figure is tied to obligations under CORSIA, the UN aviation sector’s Carbon Offsetting and Reduction Scheme for International Aviation, which is moving from a voluntary pilot phase into mandatory periods with stricter eligibility rules for offset credits. The piece outlines how supply constraints on qualifying credits, combined with rising baseline emissions from recovering air travel, could push prices higher and concentrate costs on carriers without access to in-sector decarbonization options like sustainable aviation fuel. ...

Carbon Herald just published Captura Secures New $12.5M To Grow The US Production Of Its Bipolar Membrane Electrodialysis Tech. Carbon Herald reports that Captura, a company developing direct ocean capture technology, has closed a new $12.5 million Series B round. The funding is earmarked for expanding domestic US manufacturing of its bipolar membrane electrodialysis systems, the core component of its process for extracting CO2 from seawater. The approach uses electricity to shift seawater pH, releasing dissolved CO2 for capture, after which the treated water is returned to the ocean. The company has been advancing pilot deployments and aims to use the capital to build out hardware production capacity to support larger commercial-scale projects. ...

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The critique, in the critic’s own words “Smart Art,” wrote veteran energy journalist Peter Fairley (@peter.fairley.ca on Bluesky) this week, flagging ProPublica and Drilled’s False Promises investigation. The package’s operator-level charge is sharp: real capture installations chronically miss their design capture rates, and the industry papers over the gap with nameplate figures in press releases. ...

Captain Drawdown’s weekly Sunday selection — 15 candidate stories considered, 6-9 picked. Each link carries our 1-2 sentence take so you don’t have to click everything to know what’s there. The week’s signal sits at the intersection of policy plumbing and capital flows: jurisdictions are linking compliance markets while private registries and ocean-CDR vendors raise rounds that bet on those markets actually clearing. Meanwhile, the methodology frontier keeps creeping into stranger biology — fungi-mediated soil carbon credits being the latest test of what measurement, reporting, and verification (MRV) can credibly underwrite. ...

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. Europe just turned its removals regulation into a live procurement venue, and most suppliers outside the bloc haven’t noticed. The Carbon Removals and Carbon Farming (CRCF) Buyers’ Club website went live this week, giving certified European suppliers and corporate buyers a single matchmaking layer under one EU-defined methodology. That is a quiet but important shift: the CRCF stops being a 2027 paper framework and starts behaving like the price-setting venue for what counts as a “removal” inside Europe. ...

Carbon Herald just published BioCirc Launches World’s Largest BECCS Facility In Denmark. Carbon Herald reports that Danish biogas developer BioCirc has inaugurated a bioenergy with carbon capture and storage (BECCS) facility in Denmark that the company claims is the largest of its kind globally. The site ties carbon capture to BioCirc’s biogas production, allowing CO2 generated during biogas upgrading to be captured and routed to permanent storage. The launch positions Denmark as an early hub for biogenic CO2 removal at commercial scale, building on the country’s existing CCS infrastructure and North Sea storage projects. Further details on capture volumes, storage offtake partners, and project economics are covered in the full article. ...

CDR.fyi just published Accelerating Carbon Removal with AI. Published June 25, 2026 by Alexander Rink and Kat McNeill, this CDR.fyi piece examines AI’s double-edged role in carbon removal. It draws on two campfire sessions hosted by CDR.fyi at Carbon Unbound East Coast in New York on May 19-20, bringing together suppliers, buyers, researchers, and technology companies. The authors note that AI is driving up electricity, data-centre, and cooling demand, which may increase the need for CDR, while also offering tools that can speed up scientific work, monitoring, and verification. They flag registry, validation, and verification workflows as near-term opportunities, and argue that specialized systems often outperform general-purpose chatbots for domain tasks. ...

Carbon Herald just published The Official EU CRCF Buyers’ Club Website Is Now Live. Carbon Herald reports that the European Commission has gone live with the official website of the Carbon Removals and Carbon Farming (CRCF) Buyers’ Club. The platform is tied to the EU’s CRCF framework, which sets out rules for certifying carbon removals and carbon farming activities across member states. The Buyers’ Club is intended to connect potential purchasers with suppliers of certified removals and farming credits, aiming to build early demand under the new certification regime. The launch marks an operational step beyond the regulatory text adopted earlier in the policy cycle. ...