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Apr 5 3 tweets 8 min read Read on X
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (30 March - 05 April 2026):

📺:

🧵1/
@CarbonUpcycling raised up to $10M from ATEL Ventures for CO₂-to-low-carbon cement.
betakit.com/carbon-upcycli…

CURA secured $500K from Alberta Innovates for circular cement tech.
curaclimate.com/press/cura-sec…

AirSmat and Dantata Foods partnered to deploy a corn-cob biochar CDR project in Nigeria.
thisdaylive.com/2026/03/30/air…

TransZero and Kita partnered on carbon insurance risk modelling.
transzero.co.uk/insights/trans…

Boeing signed a 40,000 tCO₂ soil carbon credit deal with Grassroots Carbon.
esgtoday.com/boeing-signs-4…

Sensirion partnered with ClimeFi for durable CDR sourcing through 2028.
sensirion.com/company/news/p…

Symbiosis Coalition members Google, McKinsey, and Meta signed 131,240 tCO₂ removal deals with Living Carbon.
livingcarbon.com/press-releases…

@cdr_fyi and Open Standard Carbon Removal Purchase Agreement (OSCAR) have launched the first survey dedicated to understanding how CDR suppliers navigate CDR offtake agreements.
cdr.fyi/blog/oscar-sup…

@cur8earth and @Isometric_HQ launched “The 2030 Portfolio” for diversified CDR access to buyers.
cur8.earth/isometric-2030…

Mombak issued first Isometric-verified enhanced weathering credits.
isometric.com/writing-articl…

Kiilto Ventures invested in Vateris for carbon-to-materials tech for construction.
sttinfo.fi/tiedote/719277…

The remove CDR accelerator program announced plans to start providing support to startups active in this sector in Latin America.
remove.global/latam-accelera…

Ireland launched a biochar socio-economic impact framework tender. Deadline: 29 April 2026
irelandtenders.com/tender/cft-pro…

Sirius Regenerative issued Colombia’s first CO₂ removal certificates via Puro.earth.
linkedin.com/posts/puro-ear…

World Ocean Council and PONANT opened a 2027 call for ocean research projects, offering ship-based berths for in situ studies, including mCDR. Deadline: 10 April 2026.
linkedin.com/posts/jillstor…

SICTOM PEZENAS-AGDE in southern France issued a €13.7M biochar facility tender. Submission deadline: 29 May 2026
carbon-pulse.com/499931/

Absolute Climate has released a new methodology for voluntary consultation proposing a novel CDR approach based on controlled interruption of human respiration, framing exhalation as a measurable CO₂ transfer.
cdn.prod.website-files.com/6632091111ed17…

Italy announced to launch Its first dedicated CDR network called Rete Italiana Rimozione Carbonio.
carbonherald.com/italy-is-launc…

The Symbiosis Coalition has issued its second request for proposals for high-quality CDRs, broadening its scope beyond reforestation and agroforestry to include mangrove projects.
symbiosiscoalition.org/rfp
us06web.zoom.us/webinar/regist…

A new World Economic Forum + ClimeFi reported CDR markets are growing but still constrained by cost and standards.
weforum.org/publications/c…

A new report by UTS Institute for Sustainable Futures and CSIRO outlined workforce needs for scaling CDR in Australia.
uts.edu.au/case-studies/b…

@CarbonGap flagged major biogenic emissions accounting gaps in a recent report.
carbongap.org/the-biogenic-b…

Octavia Carbon’s community programs reached 2,250+ people in Kenya.
…682194.fs1.hubspotusercontent-eu1.net/hubfs/14568219…

Climeworks published guidance on high-quality biochar credits.
climeworks.com/guide/why-high…

Carbon Dioxide Removal Mission released a new report on “Common LCA/TEA Methodology and Case Studies for Direct Air Capture.
mission-innovation.net/wp-content/upl…Image
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More from @geoengineering1

Apr 3
🚨🗞️Monthly Solar Geoengineering Updates (March'26 Edition)🗞️🚨

From UN review of #SRM tech & its human rights impacts, to US organizations resisting SRM bans, plus new tools & research awards – SRM headlines you need to know from the past month:🧵1/13

🔗 …largeoengineeringupdates.substack.com/p/monthly-sola…Image
🚨Top 10 SRM Updates from March 2026:

1️⃣ @OHCHR_MENA seeks input on climate technologies - The UN Human Rights Office is collecting submissions on how SRM & CDR may impact human rights, with a report due later this year.

2/13 Image
2️⃣ US National Security Framing – ACCF report urges federal research and international governance to prevent rivals from gaining strategic advantage.

3/13 Image
Read 14 tweets
Apr 1
🚨Direct air capture (#DAC) using amine-based sorbents is one of the "most promising ways" to remove CO₂, but a core challenge remains: the materials degrade over time, raising costs and limiting scale.

A new study examines why that happens and how to fix it.🧵1/12 Image
2/ Degradation here means any chemical or physical change that reduces CO₂ uptake or increases energy needed for regeneration.

Over time, even small losses compound, turning a promising material into a costly bottleneck.
3/ The paper highlights that degradation is not a single process.

It emerges from a combination of oxidative, thermal, and environmental pathways, each interacting with the sorbent’s molecular structure in different ways. Image
Read 14 tweets
Mar 26
🚨New research from WashU shows that diamond dust, long proposed as an ideal solar geoengineering (#SRM) material for #SAI, may lose much of its cooling potential when real-world chemistry & manufacturing constraints are taken into account.

DETAILS🧵1/11 Image
2/ Solar geoengineering, particularly stratospheric aerosol injection (#SAI), seeks to mimic volcanic cooling by dispersing reflective particles into the upper atmosphere, reducing incoming solar radiation and temporarily offsetting warming.
3/ Sulfate aerosols (from volcano-like approaches) can cool the planet, but they come with risks: acid rain, ozone damage, and health impacts.

So scientists have been searching for safer alternatives like diamond.
agupubs.onlinelibrary.wiley.com/doi/10.1029/20…
Read 13 tweets
Mar 18
🚨Where should Direct Air Capture (#DAC) be deployed to scale carbon removal?

New research shows: costs are driven less by the technology itself and more by location, climate, and energy systems, making DAC a fundamentally geo-dependent solution.

Details🧵1/10 Image
2/ DAC needs to scale to 0.5–5 GtCO₂/year by 2050, yet current capacity is ~0.00004 Gt.

Scaling requires massive cost reductions, and smart siting.
3/ The study evaluates two leading approaches:
• Solid sorbent DAC (S-DAC)
• Liquid solvent DAC (L-DAC)

Using global, high-resolution data on weather and renewable energy availability.
Read 12 tweets
Mar 12
🚨Could massive volcanic events trigger natural carbon dioxide removal (#CDR)?

New study suggests that during the Emeishan supervolcanic eruptions (~260M yrs ago), enhanced weathering of uplifted rocks removed huge amounts of atm CO₂, cutting levels nearly in half.

How?🧵1/11 Image
2/ Large igneous provinces (LIPs) are among the largest volcanic events in Earth’s history, typically releasing huge volumes of lava over 1-5 million years.

They’re widely thought to drive CO₂ spikes, warming, and environmental crises through massive volcanic degassing.
3/ To test this assumption, researchers reconstructed atmospheric CO₂ levels across the Emeishan volcanic episode using carbon isotopes from chlorophyll-derived biomarkers preserved in marine sediments from the Shangsi section in China.
Read 13 tweets
Mar 11
🚨How much does the shape of particles matter for #SolarGeoengineering?

A new study tests whether non-spherical particles could improve the cooling efficiency of #SAI.

The result: shape can help slightly, but particle size & refractive index dominate the cooling effect.🧵1/11 Image
2/ SAI aims to cool Earth by injecting particles into the lower stratosphere that scatter incoming sunlight back to space, increasing planetary reflectivity (albedo).

The effectiveness of these particles depends on their optical properties, how they scatter and absorb sunlight.
3/ Most previous studies optimized SAI particles assuming they're perfect spheres, focusing on 2 parameters: particle radius & refractive index.

But real particles in the atm are often irregular or elongated, raising an imp Q: could particle shape improve solar reflection?
Read 13 tweets

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