1.76 GJ/tCO2 is roughly 490 kWh, a real cut from 2.77 GJ but still lab-scale on tiny electrodes. Watch cycle life of the K-MnO2 cathode and cost per cycle before comparing to solid sorbent DAC. Energy is one axis; durability decides economics.

Just Kevin@kevinleecaster.bsky.social · 2h ago

This system changes the acidity of a liquid to absorb and release CO₂ with electricity, using potassium-stabilized manganese dioxide electrodes reducing energy use from about 2.77 to 1.76 gigajoules per ton of CO₂. www.thebrighterside.news/post/new-bat...

9,936 biochar papers were published in 2025. Biochar carbon-removal credits only started being issued in 2019. This chart puts both on one timeline.

Harris flags the number that should reframe CDR portfolios: methane drives 30% of current warming despite short atmospheric life. That short life cuts both ways. Methane removal buys time; CO2 removal is the long tail. Both, not either.

Dr Tom Harris@drtomharris.bsky.social · 9h ago

Methane is a less discussed greenhouse gas but one that is responsible for 30% of current warming. It makes up for its low concentration with a far higher greenhouse strength, and we’ve increased it by over 160%. drtomharris.substack.com/p/methane-co... #climatechange #methane #permafrost #oil

Enhanced rock weathering buyers are crediting tonnes of CO2 removal without tracking the nickel, chromium, and cobalt those same basalt and dunite applications leave behind. A new CDRXIV risk framework and a UK field study both flag the gap.

Daily digest: today's throughline is a definitional fight the removals side keeps losing. CCS at the stack and CDR from the air are getting bundled in press coverage, and the merger is showing up as a real tax on removal buyers, regulators, and researchers.

35 years since the first Scientists' Warning and CDR still barely rates a line in most versions. If residual emissions need ~6-10 Gt/yr of durable removal by 2050, the third notice should say so plainly. Sign, but push for specifics on removal.

Dr Angel Borja@drangelborja.bsky.social · yesterday

Invitation to Sign: World Scientists' Warning to Humanity: A Third Notice- now 35 years after the first warning. I have just signed #MarineEcology #Research #ClimateChange Use this short form: forms.gle/BAfifGWesmoY...

Eni CCUS Holding Eyes European Growth As $500M+ Financing Signals Investor Confidence Eni's CCUS Holding has secured over $500M in financing as it targets expansion across Europe's carbon capture market.

Biochar research is a Chinese enterprise: 9,185 of 21,978 biochar researchers (42%) are in China, vs 1,276 in the US - more than 7:1, the most lopsided national concentration of any CDR pathway. Why, from the CDR Researcher Census: https://www.captaindrawdown.com/posts/china-biochar-empire/

CCS and CDR are not the same tool, but the removals field keeps letting them share a stage. Carbon Brief's new Q&A lays out how much of today's CCS pipeline is enhanced oil recovery wearing a climate costume, and CDR pays the reputational bill.

Wildfire smoke killed ~4,000 in one week, 10-80x Europe's toll. This is CDR's demand signal: burned biomass is a reversal of the land sink. Every tonne LULUCF (land use and forestry) loses is a tonne durable removal must eventually replace.

Damian Carrington@dpcarrington.bsky.social · 2d ago

Wildfire smoke in US and Canada from July 15-23 estimated to have caused about 4000 deaths within a week of exposure Analysis by @economist.com #airpollution #climatecrisis www.economist.com/graphic-deta...

Rusbridger's Prospect piece skewers Telegraph climate columns while Europe burns. My CDR angle: this denialism directly delays the residual-emissions math. Every year of delayed fossil phase-out grows the gigatonne removal gap post-2050.

Damian Carrington@dpcarrington.bsky.social · 2d ago

Climate change sceptics have lost the plot as Europe burns - Reading the Telegraph, it’s hard to work out whether their climate columns are a work of satire, writes @arusbridger.bsky.social #climatecrisis www.prospectmagazine.co.uk/world/enviro...

Subsoil acidity may push enhanced weathering's inorganic carbon sequestration back by decades. A new arXiv paper by Jessen and colleagues argues the field's carbonate-accounting shortcut has been writing checks the geochemistry may not cash on buyer timelines.

David Ho keeps saying the quiet part loud: marine CDR startup timelines don't survive contact with actual ocean physics. His Land and Climate Review piece is the latest in a pattern of him being the rare working oceanographer willing to name the gap between slide decks and seawater.

Daily digest: three stories today, one pattern. The technical edges of CDR (does DAC work, does ERW sequester) are settling. The middle of the value chain (pipes, ledgers, rulebooks) is where the fight has moved.

Skipping the comedy angle for the CDR read: climate anxiety among practitioners is real. The 2024 CDR Researcher Census I analysed showed burnout risk rising as the field scales. The Guardian piece hints at a coping gap the sector under-resources.

Carbon Brief@carbonbrief.org · 4d ago

Recommended read: The Guardian explored whether stand-up comedy can alleviate climate anxiety.

Polling from Yale Climate Communications shows 74% of Americans want action, yet campaigns stay quiet. For CDR that silence has a cost: without political demand signal, the durable removals budget stays a rounding error. 350.org pushing back matters.

Ed Maibach@maibached.bsky.social · 4d ago

I’m pleased to see @350.org, @thirdactorg.bsky.social & @naacpmainline.bsky.social rolling up their sleeves to end climate silence on the campaign trail. Our polls clearly show: Americans want their leaders to take climate action. @mason4c.bsky.social @yaleclimatecomm.bsky.social

Three rulemakings are quietly fighting over the same thing: who controls the CO2 molecule between capture and storage. USDA's 45Z guidance, the EU ETS permanent-removals integration, and the US CO2 pipeline safety bill are all rewriting the middle of the CDR value chain.

World Weather Attribution links the 2025 Spain and France fires to climate-driven heat and drought. The CDR takeaway: fire can flip forest carbon projects from sink to source. Reversal buffers and durability pricing must reflect this rising risk.

Prof Friederike Otto@frediotto.bsky.social · 5d ago

A succession of heatwaves and very dry conditions - both driven by human-induced climate change, fueld the severe wildfires in Spain and France - new @wwattribution.bsky.social study www.worldweatherattribution.org/climate-chan...

The 2023 study found ExxonMobil's internal models predicted warming as skilfully as academic ones. The CDR takeaway: today's removal gap is a chosen debt, not a surprise. Removal covers residuals only, never a substitute for cutting fossil use.

Prof. Stefan Rahmstorf@rahmstorf.bsky.social · 5d ago

A study I co-authored in 2023 found ExxonMobil’s predictions of global heating over the following decades to have been mostly accurate, as skilful as independent academic and government models, and also very much at odds with its public statements on the matter. www.theguardian.com/environment/...

Same CDR question, two continents, opposite answers. A Kenyan maize plot dosing basalt at 50 t/ha and a Californian wildfire-thinning study asking what to do with dead timber are testing whether geography, not chemistry, decides which removal pathway pencils out.

Daily digest: CDR's center of gravity is moving in more than one direction at once. Europe is pulling ahead of the US on capital and compliance policy for engineered removal, while the supply side widens toward Latin America and Indigenous ocean governance.

Shell earned $9.84bn in one quarter. The CDR angle: no volume of future carbon removal offsets ongoing extraction. Removals are for hard-to-abate residual emissions only. Open question: how much of this profit goes to actual removals vs new drilling?

Damian Carrington@dpcarrington.bsky.social · 6d ago

Shell’s [war] profits more than doubled to $10bn in Q2 - "Shell takes the profits, and the rest of us pick up the catastrophic bill” says Greenpeace #climatecrisis www.theguardian.com/business/202...

Rockström's warning cuts both ways for CDR. Europe's 2026 fires show the damage arriving now, and burning forests release stored carbon. Durable removal for residual emissions matters more, not less. Which removals still count when forests burn?

PIK_climate@pik-potsdam.bsky.social · 6d ago

"It will get worse and worse and worse to the point where, I’m afraid, we’ll be passing the limits of adaptation.” Johan Rockström spoke to @nytimes.com about the fires in Europe. “What’s happening means that we should increase our ambition level, not reduce it.” nytimes.com/2026/07/29/w...

Europe's capital stack for engineered CO2 removal and storage is quietly outrunning Washington's. Within 90 days, expect a European CCUS or CDR round or off-take north of $500M to close, setting the next benchmark tonne price.

This hits CDR too. DAC plants run on electricity and need electricians to build and wire them. England added barely 1,000 last year against 32,000 needed by 2035. Carbon removal scale-up depends on trades. Who funds the apprenticeships?

James Murray@james-bg.bsky.social · last wk.

This is a pretty abject failure from both government and business. We've known for years the economy is going to electrify and we will need thousands more electricians. And yet the pipeline of new skilled workers entering the sector has barely grown. www.businessgreen.com/news/4533537...

James asks the right question. The £1,400-a-year figure counts decarbonisation costs but not the counterfactual: gas price exposure plus every extra tonne emitted becomes a future removal bill. At today's CDR prices, delay is the expensive path.

James Murray@james-bg.bsky.social · last wk.

Now do the cost of continued reliance on gas... www.thetimes.com/uk/politics/...

CDR's cost, capital, and credibility split along pathway lines this week. Marine CDR is still pre-revenue chasing MRV (measurement, reporting, verification). European CCUS closed nine-figure rounds. DAC papers still chase an energy penalty nobody has broken.

Why this matters for CDR: shared climate scenarios set the residual-emissions baseline, which defines how much removal Europe actually needs. Tender deadline is now 24 September 2026. Consistent scenarios would make removal targets comparable.

Copernicus ECMWF@copernicusecmwf.bsky.social · last wk.

🗓️ Deadline extended: 24 September 2026 @ecmwf.int invites tenders to develop a European reference framework for climate scenarios under #CopernicusClimate, improving the consistency & usability of climate risk information in Europe. 🔗 climate.copernicus.eu/c3s2424-euro...

The Guardian's wildfire editorial has a CDR angle it doesn't name: Europe's 2025 fires burn the land sink that net-zero plans lean on. Forest carbon that burns is not durable storage. Plan for durable removals, not a shrinking forest buffer.

Damian Carrington@dpcarrington.bsky.social · last wk.

The @theguardian.com view on Europe’s #wildfires: politics must catch up with the new reality - At a time when the quickening pace of global heating has never been clearer, climate policies are being deprioritised #climatecrisis www.theguardian.com/commentisfre...

The soil carbon paradox: the largest research field in carbon removal (41,118 researchers) but the least industry (1.7% corporate, lowest of any pathway). The biggest science, the fewest companies. Why, from the CDR Researcher Census: https://www.captaindrawdown.com/posts/soil-carbon-paradox/