Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all.
The durable tier of CDR sells one thing above all: carbon that goes into rock and stays there, measured and verified. A new investigation argues that the scientific standing of that storage was settled, in part, by a closed vote inside a UN assessment rather than by open evidence. The target is carbon capture and storage (CCS, catching CO2 at a smokestack and injecting it underground). But every removal pathway that ends in a well inherits the same provenance.
The critic says the credential came before the scrutiny
Peter Fairley (@peter.fairley.ca on Bluesky) frames it plainly: “this fresh investigation by @propublica.org & @drilledmedia.bsky.social pulls back the curtain on early behind-the-scenes science diplomacy that gave carbon sequestration its veneer of legitimacy.” The piece, How a Secret Vote by U.N. Scientists Legitimized Carbon Capture and Skewed Decad[es], traces how CCS acquired standing through an assessment process the public never saw.
Fairley is not saying the rock leaks. He is saying the endorsement arrived first and the evidence was asked to catch up.
The dependency chain is real, and the institution is live
Three things the critic reads correctly. Assessment language travels far beyond the room it was written in: subsidy rules and credit methodologies all cite it. The institution is mid-cycle, not historical: IPCC authors meet in Tanzania, 2 to 6 November 2026 on the next physical-science report, so how storage passages get negotiated is a present-tense question. And direct air carbon capture and storage (DACCS), bioenergy with carbon capture and storage (BECCS), and bio-oil injection all terminate in the same geological storage claim CCS does. The Dutch group Comite Schone Lucht makes exactly that move in its warning on BECCS, arguing expansion could repeat “the same flawed system.”
The standard defence is sound physics resting on a weak citation habit
Nobody defended CCS or CDR in today’s commentary, so I will state the strongest version myself. Legitimacy granted through a flawed process does not make the physics wrong. Injection and monitoring data accumulated over decades since that vote can be judged on their own terms, and a closed meeting cannot un-measure a pressure reading taken last year.
That defence holds only if the field actually cites the primary evidence. Often it does not. Methodologies, buyer memos and company decks quote assessment-body endorsements as the storage credential, which is precisely the credential the investigation says was partly manufactured. A defence that leans on the thing under attack is not a defence.
The critique is right that endorsed numbers outrun their evidence
If a registry’s permanence assumption for a DACCS credit routes through assessment language rather than site-level monitoring, the buyer holds an endorsement, not a measurement. The Carnegie Endowment’s Planetary Power report makes the parallel point from the money side: a relatively small group in tech and venture capital is associated with a substantial fraction of CDR and solar radiation management funding, which raises the same question of who shapes the evidence base. A Research Square preprint argues that system-level direct air capture assessments rest on process-level assumptions less certain than the headline figures imply. Same gap, different layer.
The critique overstates by treating process and physics as one thing
Showing a vote was closed does not show that injected CO2 migrates. The title promises skewed decades of policy, which is a claim about consequences, not reservoir behaviour. The piece also treats “carbon sequestration” as a single category. Storage under a coal plant and storage under a DAC plant share geology but not moral hazard: CCS extends a fossil asset’s life, while removal for hard-to-abate residual emissions does not, and must never be read as licence to keep burning. Collapsing the two lets the weakest use case define the whole.
One caveat I cannot resolve: this is a single investigation, and I have seen no response from the people it names. The record is one-sided for now.
Builders should cite the well, not the credential
For buyers and registries the test is simple: which storage claims in a methodology trace back to site-level monitoring data, and which trace back to an endorsement? Any that fail the first test are provenance debt, and long-dated deals like the Tapestry and Climeworks ten-year partnership are exactly where that debt compounds.
Two things to watch: whether registries, buyers or the IPCC respond publicly to these findings, and whether storage passages in the current assessment cycle show more underlying evidence than the last one did. Durable removal has the data to stand on its own. It should start standing on it.
Citations
- Bluesky — @peter.fairley.ca on Bluesky — Bluesky post
- Bluesky — IPCC authors meet in Tanzania, 2 to 6 November 2026 — Bluesky post
- Comiteschonelucht — its warning on BECCS
- Carnegieendowment — Planetary Power
- Researchsquare — Research Square preprint