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CDR Daily Digest — 2026-06-04

The operator stack is finally visible Today’s stories share one thread: carbon removal is becoming an industry with a defined shape. We can see who builds, who measures, who buys, and how many people actually work in it. That picture is smaller than the press cycle suggests, but it is more legible than it was a year ago. The Graphyte-Sumitomo deal, paired with Graphyte’s listing on Isometric, shows the stack snapping into place. Graphyte does the carbon casting. Sumitomo brings industrial offtake and capital. Isometric certifies the tonnes. Three roles, three companies, one delivered tonne. That separation of duties is what a real industry looks like. It is also what buyers have been asking for: an operator they can contract with, a registry they can audit, and a balance sheet behind both. ...

Take: The State of CDR 2026: The CDR Policy Scoop Verdict

Take on a podcast episode from The CDR Policy Scoop, originally published Tue, 02 Ju. Listen: https://shows.acast.com/the-cdr-policy-scoop/episodes/the-state-of-cdr-2026-the-cdr-policy-scoop-verdict TL;DR Third edition of the State of CDR report drops: 300 pages, 75+ authors, two-year cadence now established as the canonical reference doc. Global novel CDR sits at 2.1 Mt gross — but the report finally shows per-pathway net/gross gaps (bioenergy with carbon capture and storage (BECCS) net is 68–98% of gross, DACCS 23–90%). Material for anyone quoting headline tonnages. 2025 reality check: first edition projected 11 Mt novel by 2025; actual is ~2 Mt. Hosts flag 2030 announcements (42 Mt) vs estimated delivery capacity (8.4 Mt) as the next gap to watch. Across IAM scenarios that actually reach net-zero CO2, CDR averages 16% of mitigation effort — higher than the 10% figure often cited in corporate target-setting. CDR captures 2.6% of climate-tech funding. Low enough to puncture the “CDR is eating climate’s lunch” narrative. Sebastian Manhart and Eve Tamme got an embargoed copy of the third State of CDR report and spent 30 minutes pulling out what surprised them rather than re-reading the executive summary. It’s a useful filter episode if you don’t have time for 300 pages this week. ...

Take: Viridas Pressurised DAC, El-Sayed

Take on a podcast episode from Reviewer 2 does geoengineering, originally published Fri, 15 Ma. Listen: https://podcasters.spotify.com/pod/show/reviewer2geoengineering/episodes/Viridas-Pressurised-DAC--El-Sayed-e3jct2c TL;DR Viridas pitches “pressurized DAC”: compress incoming air to ~70 bar so CO2 partial pressure jumps from ~400 ppm to ~2.8%, shrinking contactors ~70x. Sorbent is a cheap aqueous ammonia + alkali carbonate mix (carbamate formation + bicarbonate buffer), regenerated thermally at ~90–110°C. Sensible chemistry, nothing exotic. Core thesis: solvent R&D is hitting thermodynamic limits; the real lever is CAPEX, attacked by retrofitting gas-turbine turbomachinery as compressor/expander. Claimed round-trip efficiency target: ~97–98% (vs ~70% for current compressed-air energy storage). That’s the whole ballgame and it’s not demonstrated. No technoeconomic assessment shared, no pilot, no funding disclosed, Gmail contact address. Treat as concept-stage. The host of Reviewer 2 Does Geoengineering interviews Ahmed El-Sayed, co-founder of Viridas Technologies, about a pressurized DAC concept built around retrofitted gas-turbine machinery. The episode is recorded walking through a Cambridge park, which means a non-trivial fraction of the runtime is ice cream and hawthorn commentary — the substantive technical content is maybe 35 minutes. ...

Take: Why carbon removal needs a new story

Take on a podcast episode from The Carbon Curve, originally published Wed, 25 Ma. Listen: https://carboncurve.substack.com/p/why-carbon-removal-needs-a-new-story TL;DR Höglund argues CDR should shift from “speed and scale” to “prove and learn”: drive down costs, nail measurement, reporting, and verification (MRV), demonstrate at relevant scale. Useful reframing. Voluntary demand likely exceeds compliance demand through ~2040. EU ETS + UK ETS maybe a couple hundred million tons total by mid-2030s. First time I’ve seen the number stated that bluntly. Aviation and shipping legislation (ReFuelEU, FuelEU Maritime) effectively locks CDR out as a compliance pathway. Advocacy gap, not science gap. “Last resort” framing was a self-own. CDR is rate-limited, not stock-limited — building capacity today doesn’t deplete future capacity. High-profit/low-emission buyers (tech, finance) sustain the beachhead market; heavy industry won’t buy voluntarily and shouldn’t be expected to. Reflects reality, not aspiration. The Carbon Curve, Ep. 62 — Na’im Merchant interviews Robert Höglund (Milkywire, CDR.fyi co-founder, Marginal Carbon) for a state-of-the-sector check-in. The conversation is essentially Höglund’s argument for retiring the “we need 6–10 Gt by 2050, scale now” narrative and replacing it with a more sober “prove the methods, drop the costs, serve future decision-makers a credible menu” frame. ...

569 pure-play CDR startups employ just 9,499 people

This chart plots every pure-play CDR company in the Directory as a single dot. The horizontal axis is the company’s founding year (estimated from its primary domain registration), the vertical axis is its current headcount on a log scale, and the colour codes the company’s pathway. The shaded blue background traces overall company density — darker patches mark where the crowd of pure-plays sits. The value here is shape, not ranking. A bar chart would tell you how many companies exist in each pathway; this view tells you the entire industry’s growth contour at one glance — when did the wave of small startups hit, where are the rare big older operators, what cluster sits on the floor of “still under five people”. Outlier dots near the top of the chart are the names everyone already knows; the dense low band is where most of the industry actually lives. ...

Captain's CDR Log #155: Graphyte's Sumitomo deal and Isometric listing reveal the new operator stack

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. The story Graphyte locked in two operator-grade milestones in a single week. Sumitomo, a Japanese trading house with infrastructure-scale capital and offtake reach into Asian utilities and steel, took a backing position in the company. At the same time, the project landed a public listing on the Isometric registry with an inspectable file, prj_1J4P33N6W1S0RKE2. That combination, a sovereign-adjacent industrial balance sheet plus a registry-grade MRV (measurement, reporting, verification) record, is what direct air capture pure-plays have been trying and largely failing to assemble at this scale. It matters because durable removals still sit under 1% of delivered volumes per the 3rd State of CDR report, and the operators who break that ceiling will be the ones with cheap physical processes, a public audit trail, and an anchor buyer. Graphyte now has all three. ...

Pathway 101: Soil Carbon

What “soil carbon” means in a CDR context Soil carbon as a removal pathway is the deliberate addition — or protection — of organic carbon in agricultural and grassland soils so that atmospheric CO₂ ends up stored as soil organic matter rather than circulating in the air. In practice, almost every commercial project in the directory today is doing this through biochar: pyrolysing biomass into a stable, carbon-rich solid and burying it in farmland. A smaller share of projects pursue management-based sequestration (cover crops, no-till, compost, agroforestry) where the carbon gain comes from shifting the balance between plant input and microbial decomposition. The two approaches share a destination — carbon in soil — but the durability profiles and the science behind them are very different, which is the single most important thing for a buyer or journalist to internalise before going further. ...

Captain's CDR Log #154: What California's cap-and-invest rewrite actually changes for carbon removal buyers

Captain Drawdown’s daily logbook on every CDR story, paper, and expert voice — so you don’t have to read them all. Why this matters now California just rewrote the rules of the largest US carbon market, and the rewrite quietly weakens the compliance demand that durable carbon removal was supposed to inherit. On May 29, Governor Newsom signed a reauthorization extending cap-and-trade (now rebranded cap-and-invest) through 2045, but the package increases free allowance allocation to refineries and utilities, softening the price ceiling that residual emitters would have hit. In the same week, the SEC moved to eliminate Biden-era climate disclosure requirements. The carrot and the stick for US corporate CDR procurement both got smaller at once. ...

CDR Daily Digest — 2026-06-02

Today’s three stories all point at the same uncomfortable truth: the gap between where CDR needs to be and where it actually is keeps widening, and the reasons are increasingly structural rather than technical. A new capacity assessment finds the gap between planned CDR supply and what climate goals require is growing, not shrinking. Meanwhile a snapshot of the company landscape shows 377 of 969 tracked CDR firms are in biochar, a heavy concentration in one of the lower-permanence pathways. And Captain Drawdown’s own CDR Log #153 examined two assessments that both circle back to a geography problem: the rocks suitable for enhanced rock weathering and mineralization sit in jurisdictions whose rules are not built for them. ...

CDR capacity gap with climate goals is widening, not closing, report finds

Heatmap News just published The Sorry State of Carbon Removal. Heatmap News covers the third State of Carbon Dioxide Removal report, a collaboration among researchers at Wisconsin-Madison, Maryland, Oxford, the Potsdam Institute, and the German Institute for International and Security Affairs. The report estimates that humans intentionally remove about 2.2 billion tons of CO2 per year, roughly 5% of annual emissions, almost entirely through conventional methods like tree planting, forest management, soil sequestration, and wetland restoration. Novel approaches such as direct air capture, BECCS, enhanced weathering, and biochar account for less than 1%, growing from 1.4 million tons in 2023 to 2 million in 2025. To stay on a 1.5C path, novel removal would need to reach 70 million tons by 2030 and 360 million by 2035. ...