Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all.

This week three operating milestones landed at three different plants, and each one carried a specific number attached. That is the story: buyers are writing checks against measured performance, not pathway narratives.

Start with the Icelandic geothermal capture number. Carbfix reported 99.6% capture of both CO2 and H2S from flue gas at an operating geothermal plant, with mineralization completing inside two years (ThinkGeoEnergy). Mineralization has been promising field-verified capture percentages for years. This is one, on real flue gas, at a working power station.

Next, Climeworks. Not a new plant, not a ribbon-cutting. The company reports it has doubled CO2 capture at its Mammoth facility in Iceland and cut operating expenditure (OpEx, the ongoing cost of running the plant) by more than half, tied to 18 months of iterative upgrades to its collector containers (ESG News). This is the operator learning curve showing up in disclosed numbers rather than in a pitch deck. For readers tracking the scaling question, this is the kind of datapoint I flagged as necessary in how DAC actually scales.

Third, Carba. Biochar Today reports that Carba earned the first project validation under Isometric’s methodology for landfill-based biochar storage, and that “the milestone enabled U.S. Bank’s first durable carbon [credit purchase]” (Biochar Today, @biochartoday on Bluesky). Read that sequence carefully. The measurement, reporting, and verification (MRV) validation and the offtake are the same event. The stamp is what unlocked a first-time institutional buyer.

Chris Bataille flagged a fourth in the same window: a Yara fertilizer plant with carbon capture and storage opened in the Netherlands, with CO2 transported to Norway (@chrisbataille on Bluesky). Different pathway, same pattern. Commissioned plants replacing press releases.

Here is the tension worth naming. Public debate about CDR still argues about whether removal is real, safe, or a moral hazard. Those questions matter, and the residual-emissions-only frame still bounds every legitimate use of these tonnes. But operators this week were not arguing. They were reporting capture percentages, OpEx reductions, and validated tonnes into buyer contracts. Two conversations, running in parallel, at different speeds.

So what does this mean for practitioners.

For developers: the Carba sequence is instructive. A first-time corporate buyer moved because a third-party methodology validation existed to move against. If you are still pitching a pathway rather than a validated project under a named methodology, you are pitching to a shrinking audience. Whirlpool’s new portfolio, assembled through ClimeFi across multiple methods (ESG News summary via the buyer-side coverage this week), is the demand-side version of the same shift: buyers want comparable, measured performance across methods, not a single flagship.

For buyers: Supercritical reports that 81% of what it classifies as high-quality biochar supply for the year is already contracted (Carbon Herald). That is a data point about one buyer platform’s view of one pathway in one year. Take it as that, not as a market-wide forecast. But it is consistent with what the validation-linked Carba deal shows: validated supply is being contracted faster than unvalidated supply.

One caveat on the Climeworks number. “Doubled capture” and “OpEx cut by more than half” are company-reported figures from a facility that has been publicly scrutinized for underperforming its nameplate. They are directional evidence of a learning curve, not audited unit economics. A disclosed dollar-per-tonne figure would be a different tier of information. Climeworks has not published one at Mammoth.

What to watch: whether the next round of operator disclosures from any of these three plants includes cost per tonne alongside capture percentage. Capture rate without cost is half the operator story. The Carbfix 99.6% number, the Climeworks OpEx claim, and the Carba validated tonnage each answer one side of the unit-economics question. None yet answers both.

Citations

  1. Thinkgeoenergy — ThinkGeoEnergy
  2. ESG News — ESG News
  3. Bluesky — @biochartoday on Bluesky — Bluesky post
  4. Bluesky — @chrisbataille on Bluesky — Bluesky post
  5. ESG News — ESG News summary via the buyer-side coverage this week
  6. Carbon Herald — Carbon Herald