 | | | | Links to recent scientific papers, web posts, upcoming events, job opportunities, podcasts, and event recordings, etc. on Carbon Dioxide Removal TechnologyThis newsletter provides Carbon Dioxide Removal / Negative Emissions Technologies coverage free of charge and advertising. We rely on donations from readers like you to keep going. Please donate now to support our work.
Support This Newsletter TABLE OF CONTENTSNote: Click on the headings listed in the table of contents above to easily navigate to the sections you’re interested in. THIS WEEK’S TOP CDR HIGHLIGHTSSWISS CLIMATE PROTECTION ORDINANCE CONSULTATION Switzerland plans a gradual scale-up of carbon removal to help the federal administration reach net-zero emissions by 2040, alongside steep emission cuts. Removals will be sourced via certified credits under the Swiss CO₂ Act, with the environment office as sole buyer. A consultation on the rules runs until 12 Feb 2026, with implementation expected from Sept 2026.FIRST HDAC FACILITY Avnos has secured up to $17 million in project financing from Shell US Gas and Power, LLC (Shell) and Mitsubishi Corporation (Americas), announcing a finalized decision to construct a first-of-its-kind hybrid direct air capture (HDAC) facility called Project Cedar.CALL FOR PROPOSALS Carbon to Sea and the Prince Albert II of Monaco Foundation are seeking research proposals to assess how ocean alkalinity enhancement affects commercially and culturally important marine species. The partners plan to fund two 24-month projects of up to $300,000 each. Applications close 16 January 2026, supporting safer, informed OAE deployment as field trials expand.REMOVE BACKS NEW CDR STARTUPS Remove has selected 16 startups for Cohort 8 of its Europe CDR Accelerator Program after a three-month open call. The new cohort will receive training, coaching, networking and non-dilutive funding to scale carbon removal solutions. Selected companies include carbondrop™, Pure Hawa, reilo, Restord, BioBright, ReStore Carbon, Alpine X, fortyfour, Reaforma, Circular Carbon Pathways, Carbony, CO₂Zero, Carbonway, KORALL, Exothermite, and Lightnet Carbon Capture.Q3 CDR MARKET UPDATE According to a new report by CDR.fyi, the durable CDR market reached 8.5 Mt contracted in Q3 2025, up 54% from Q2 and already surpassing 2024 totals. However, 93% of volume came from two Microsoft megadeals, with only 604 kt purchased by 67 other buyers. Biomass-based pathways dominated. Despite record contracts, delivery and buyer diversification remain weak signals for the sector’s strength.CALL FOR CONSULTATIONS The Science Based Targets initiative (SBTi) released a revised 97-page draft of its Corporate Net-Zero Standard V2.0, offering companies more flexibility on targets while tightening ongoing emissions rules. The draft allows feedback until Dec 8, with the final version published in 2026 and mandatory adoption of its rules starting in 2028.AUSTRALIAN CDR ROADMAP CSIRO Futures and CarbonLock released the Australian Carbon Dioxide Removal Roadmap, finding Australia could remove up to 330 Mt CO₂/year by 2050. It highlights opportunities to scale CDR, support net zero, and engage in global carbon markets.Read on to unpack more updates: COMMERCIAL NEWS Share RESEARCH PAPERSAuthors: Bingzheng Wang and Fengqi YouSynopsis: Enhanced rock weathering on croplands can remove CO₂ and support equitable decarbonization. Low-GDP regions hold 55–89% of national ERW potential, and deploying ERW on 10% of cropland could remove ~22.9 Gt CO₂ by 2075. Carbon trading with wealthier regions could yield economic gains up to 4.5% of local GDP. This approach aligns with COP29 goals, enabling regions to contribute to climate mitigation according to their strengths.
Authors: A. M. Hassan; I. Mohamed; O. Sameh; M. Fawzy; Y. Panchal; A. Amirlatifi; O. Abou-Sayed; A. Abou-SayeSynopsis: This study evaluates using subsurface Biosolid Slurry Injection (BSI) at Los Angeles’s TIRE facility to offset CO₂ emissions from population growth. Population-driven biosolid generation strongly correlates with CDR potential (R² = 0.96). Current operations sequester ~0.3 Mt CO₂e/yr per well; scaling to seven wells could achieve ~154,000 Mt CO₂e/yr. The analysis provides a city-scale roadmap linking municipal biosolid management with scalable carbon removal, offering a transferable strategy for growing urban centers pursuing net-zero targets.
Authors: Tullia Calogiuri, Mathilde Hagens, Jan Willem Van Groenigen, Florian Wichern, et al.Synopsis: Enhanced rock weathering captures atmospheric CO₂ and may stabilize soil organic carbon, with earthworms playing a key role. Using stable isotope tracing, the study shows that live earthworms promote organo-mineral associations via dejections, enhancing organic carbon persistence, while dead earthworms boost microbial activity, increasing inorganic carbon capture. Earthworms thus influence carbon cycling across their life cycle through distinct biological and physico-chemical pathways.
Authors: Lennart T. Bach, Phil Williamson, Joanna I. House & Philip W. BoydSynopsis: Claims that natural CO₂ removal constitutes anthropogenic climate mitigation are increasingly misleading. While this misrepresentation is common for forests and coastal ecosystems, similar errors may arise regarding open-ocean CO₂ uptake through the biological carbon pump, risking overestimation of human-driven mitigation efforts.
Authors: Yong Zhou, A. Tyler Karp, Abigail Schmidt & Corli CoetseeSynopsis: In Kruger National Park savannas, fire-derived pyrogenic carbon (PyC) contributes ~14% of surface soil organic carbon, reaching up to 40%. PyC accumulation is influenced by fire frequency, grass biomass, clay content, and low rainfall, which favor preservation. These findings highlight PyC’s significant role in savanna carbon storage and provide insight into environmental factors controlling fire-driven contributions to the soil carbon cycle.
Authors: Thomas Bossy, Philippe Ciais, Katsumasa Tanaka, Franck Lecocq, Philippe Bousquet & Thomas GasserSynopsis: Climate boundaries define safe limits for global warming, ocean acidification, sea-level rise, and Arctic ice loss. In this study, a reduced-form model maps CO₂ emissions, removal, and solar radiation management (SRM) pathways to remain within these limits. With emissions peaking in 2030, net-zero by 2050, and 10 PgC yr⁻¹ removal, the chance of staying below 2 °C is 80%, but drops to 35% when all four boundaries are combined. Results underscore trade-offs and the need for holistic climate strategies.
Authors: Tomohiro Kuwae, Yuka Suzuki, Masanori FuruyaSynopsis: Analysis of 61 blue carbon projects and 471 J-Blue Credit transactions in Japan shows that projects averaged 3.2 co-creators, with small-volume but high-value credits (~400 USD/tCO₂). About 40% of trades were local, with hard-to-abate sectors and companies with decarbonization policies driving demand. Project co-benefits influenced purchaser numbers and prices, while sector and location preferences shaped market outcomes. Results highlight the role of collaboration, project appeal, and sector-specific demand in scaling carbon credit markets and nature-based CDR.
Authors: Romain Presty, Olivier Massol & Pascal Da CostaSynopsis: A bibliometric review of 9,280 CDR publications (2015–2024) from 151 countries reveals a fragmented research landscape dominated by the EU27, US, and China. Collaborations are often nationally or thematically clustered, with few institutions bridging regions. This structural fragmentation may limit shared methodologies and coordinated policy support. Strengthening international partnerships, harmonizing standards, and aligning science with policy are key to advancing global CDR research.
Authors: Farzin Hosseinifard, Shahabeddin Ghasemzadeh, Mohsen Salimi, Majid AmidpourSynopsis: This study presents a novel DAC system integrated with enhanced oil recovery (EOR), modeled via Aspen Plus using a hydroxide-to-carbonate CO₂ absorption pathway. Machine learning, including XGBoost, Random Forest, and Decision Trees, assessed DAC’s impact on EOR in Abadan. The Decision Tree model performed best (R² = 0.87), predicting an increase in EOR efficiency from 19 % to 21.3 %, demonstrating DAC’s potential to enhance carbon management and oil recovery simultaneously.
Authors: Jianhua Ma, Yongzhang Zhou, Luhao He, Palate Kenjiebo, Yijun Zheng, Xian LiuSynopsis: Achieving carbon neutrality drives both nature-based (forests, soils, oceans) and engineered (CCUS, DAC, enhanced weathering) sequestration, but modeling challenges persist due to system complexity and heterogeneity. This review introduces a “task-data-algorithm” framework for model selection and benchmarking. AI methods like CNNs and RFs enhance mapping, prediction, and optimization. The framework aids intelligent carbon system design and informs policy for deploying effective low-carbon strategies.
Authors: Hannah Carle, David Bauman, Michael N. Evans, Ingrid Coughlin, et al.Synopsis: Long-term data from Australian moist tropical forests reveal a shift in aboveground woody biomass from a carbon sink (0.62 Mg C ha⁻¹ yr⁻¹, 1971–2000) to a carbon source (−0.93 Mg C ha⁻¹ yr⁻¹, 2010–2019). Rising temperatures and climate anomalies increased tree mortality, with no detectable CO₂ fertilization effect. Cyclones further punctuated biomass losses. These results suggest that global moist tropical forests may face a long-term transition from carbon sinks to sources under climate change.
Authors: Yosef FantayeSynopsis: In Habro District, Ethiopia, coffee-based agroforestry systems outperform parkland systems in carbon sequestration. Coffee-based systems store 33.94 Mg C ha⁻¹ in biomass and 158.1 Mg C ha⁻¹ in soil, totaling 192.64 Mg C ha⁻¹ versus 124.72 Mg C ha⁻¹ in parkland. Enhanced tree cover, litter input, and low soil disturbance drive these gains. The study highlights agroforestry as a nature-based solution supporting climate mitigation, livelihoods, and integration into carbon finance and national strategies like Ethiopia’s NDCs, REDD+, and AFR100.
Authors: Tengteng Li, Nico Eisenhauer & Zhanfeng LiuSynopsis: Climate change is altering the seasonal rhythms of soil organisms that regulate plant carbon transformation and storage. Maintaining temporal coordination between above- and belowground biota is essential for sustaining resilient soil carbon sinks under warming conditions.
Authors : Wei Han,a Yujian Laia and Hongbing JiSynopsis: Biochar, a carbon-rich product of biomass pyrolysis, can enhance soil carbon sequestration and reduce CO₂ emissions, but its effects on soil carbon cycling are complex. Priming effects may promote or inhibit mineralization, and laboratory studies may underestimate oxidation risks in natural conditions. Key stabilization mechanisms include physical protection, chemical stability, and microbial transformations. Future research should clarify molecular carbon dynamics and tailor biochar application to field and soil conditions for optimized carbon removal.
Authors: Zahra Ghahremani, David P Huber, Arash Modaresi Rad, Michael J Johnson, Jennifer PierceSynopsis: This study presents a high-resolution (30 m) soil inorganic carbon (SIC) map of CONUS using machine learning and Google Earth Engine. CONUS soils store ~77 ± 1.8 Pg SIC in the top 1 m, exceeding prior estimates. SIC occurs as lithogenic carbonates in humid regions and pedogenic carbonates in arid soils. Soil pH strongly predicts calcareous formation, while precipitation above 1700 mm/year limits pedogenic carbonate accumulation. The map improves predictions and reduces uncertainty in unsampled areas.
Authors: Vivek Ghimirey, Jay Chaurasia & Nobel AcharyaSynopsis: Soil carbon sequestration (SCS) captures atmospheric CO₂ in soils as organic or mineral carbon, offering climate mitigation and co-benefits like improved fertility, water retention, and biodiversity. From 2000–2025, SCS methods—including reduced tillage, cover crops, agroforestry, biochar, and wetland restoration—have shown promise but face challenges in quantification, climate variability, costs, and policy support. Standardized monitoring, carbon markets, and research on microbial and long-term stabilization mechanisms are needed to scale SCS globally.
Authors: David Chiaramonti, Giulia Lotti, Francesca Tozzi, David Casini, Francesco Primo Vaccari, Hamed Sanei, Michaela Luconi, Marco BuffiSynopsis: Biochar is a key CDR method with agricultural co-benefits, yet conventional soil sampling protocols inadequately quantify its carbon savings. Experiments show that spatial heterogeneity, limited sample size, and blending challenges cause SOC measurements to misrepresent actual carbon added. These limitations raise concerns for other carbon farming approaches. Robust GHG accounting requires combining careful experimental design with validated modeling frameworks to ensure defensible carbon credits and mitigation claims.
Authors: Anna Favaro, Yolima Carrillo, Balwant Singh, Charles Warren, Feike A DijkstraSynopsis: Twelve years of elevated CO₂ (eCO₂) in a low-phosphorus Eucalyptus woodland reduced mineral-associated organic matter (MAOM) C, N, and P by 15–16%, while particulate organic matter (POM) remained unaffected. The decline in MAOM is linked to rhizosphere priming, where microbes mined nutrient-rich MAOM to meet phosphorus demand, limiting soil carbon accumulation under eCO₂. These findings highlight the vulnerability of MAOM in low-P soils and its role in constraining carbon sequestration.
Authors: Cathryn A. Wynn-Edwards, Wayne Dillon, John Akl Uhril, Craig Neill, et al.Synopsis: The first Australian field trial of Ocean Alkalinity Enhancement (OAE) used continuous NaOH addition to coastal Tasmanian waters. At the release point, pCO₂ dropped by ~370 µatm and alkalinity increased by ~545 µmol kg⁻¹, with downstream pCO₂ decreases of 22–77 µatm (<1–5% signal). The trial showed rapid plume dispersion measurable in situ, demonstrating that shore-based OAE combined with local infrastructure and modeling holds potential as a scalable marine carbon dioxide removal strategy.
Pathways by which live and dead earthworms influence carbon dynamics (Source)Carbon Removal Updates is a reader-supported publication. To support my work, consider becoming a paid subscriber. WEB POPSTSShare Carbon Removal Updates REPORTSUPCOMING EVENTSNovember 2025December 2025(NEW) AGU25 Annual Meeting | 15-19 December 2025 | New Orleans2026We have curated a “Carbon Removal Events Calendar.” Explore and stay informed about upcoming events, conferences, and webinars on Carbon Dioxide Removal technology. Sync specific events / all events to your default calendar to ensure you never miss out on important CDR updates. Carbon Removal Events Calendar Add our Carbon Removal Events Calendar to your default calendar in 2 ways: Head to this link: https://teamup.com/kshqbfhrqkw36sxymd Sync specific event: Click the event → menu (≡) → Share → choose your calendar → Save. Or sync all events: Menu (≡) → Preferences → iCalendar Feeds → Copy URL → Add to your calendar settings → Subscribe. JOB OPPORTUNITIES“Puro.earth, a forerunner as a carbon removal crediting program, is on the lookout for Eligibility Managers. Eligibility Managers assist carbon removal projects in preparing for 3rd-party audits by reviewing their audit documentation, thereby contributing to the necessary due diligence of some of the most exciting solutions for permanent carbon removal. More specifically, Puro.earth is here looking for an Eligibility Manager with proven expertise in life cycle assessment and geologically stored carbon removal pathways (BECCS and DACCS).”
“At CUR8, we’re driven to build the worldwide market for carbon removals. We’re on a mission to facilitate 1 billion tonnes of carbon removed in a single year.”
“ETH Zurich’s Energy and Technology Policy Group (EPG) is looking for a postdoc working on technologies and policies for carbon dioxide removal. Led by Prof. Dr. Tobias Schmidt and Dr. Bjarne Steffen, EPG is an interdisciplinary research group investigating options for public policy and for private actors to accelerate investments in new low-carbon technologies, particularly in the broader energy sector.”
“At neustark, we’re all in for one mission: permanently removing one million tons of CO2 in 2030, and even more every year beyond that.”
“Climeworks is a leading high-quality carbon removal provider, combining decades of expertise in Direct Air Capture (DAC) technology with a holistic approach to carbon removal solutions.”
“At AirMyne, we’ve designed our process to avoid some of the most common barriers to scaling up: cost, input availability, energy, and safety. Everything we use — from our capture chemistry, to our system components — are low-cost and easy to source.”
“Alt Carbon is a deeptech science and data company, building agri infrastructure for climate action.”
“The SPIRES Lab at Yale School of the Environment invites applications for a Postdoctoral Associate to join a funded project on digital monitoring, reporting and verification for natural climate solutions and conduct other work in the area of remote sensing-enabled social science.”
“Carboneers is a climate-tech startup dedicated to unlocking the potential of biochar as a scalable solution for carbon removal.”
“At Verra, we’ve created a culture of flexibility + autonomy. You’ll be able to work with remote teams from diverse countries and industries.”
“At Carbon Upcycling, we are redefining how the world builds by transforming CO₂ emissions into performance-enhancing materials for cement, concrete, and other industrial applications.”
“Skytree enables a transition to a world with cleaner Air for everyone. We do this by developing and deploying smart technology that captures atmospheric carbon dioxide, enabling its use or storage to combat climate change and aid society and businesses around the world.”
“Nitricity is revolutionizing sustainable agriculture by developing innovative nitrogen fertilizer production technology. We are a dynamic and fast-growing company committed to creating environmentally friendly solutions for food security.”
“CREW’s technology and services make wastewater treatment cheaper and more efficient, while permanently sequestering CO₂.”
Looking for your dream job in CDR? There are 611 jobs available *right now*: check them all out at: CDRjobs Board
PODCASTSDirect Air Carbon Capture in Africa | Financing Africa’s Future | Direct Air Carbon Capture in Africa Financing Africa’s Future 18:11 |
“Can Africa lead the global race to reverse climate change? In this episode of The Financing Africa’s Future Podcast, we speak with Martin Freimüller, CEO and Co-Founder of Octavia Carbon, Africa’s first Direct Air Carbon Capture (DAC) company, based in Nairobi, Kenya. Octavia Carbon is pioneering technology that removes carbon dioxide directly from the air, using renewable energy and Kenya’s unique volcanic geology for permanent CO₂ storage.”
How Stripe (yes, the payment platform) is leading the charge for carbon removal | Speed & Scale | How Stripe (yes, the payment platform) is leading the charge for carbon removal Speed & Scale 23:09 |
“Even if we do everything we need to do to limit our carbon emissions—curb deforestation, stop driving so many miles, clean up our power grids—we still need to remove gigatons of carbon from our atmosphere to meet our climate goals. Carbon removal is still a new technology, and while carbon removal companies removed roughly 35,000 tons of carbon last year, we have a long way to go. Luckily, there are people working on creative ways to raise the capital needed for development of this crucial tech. Ryan and Anjali chat with Nan Ransohoff, Head of Climate at the online payment company Stripe, and learn about her efforts to invest in carbon removal, and encouraging other big companies to remove 10 million gigatons of carbon each year by 2050.”
Regenerative Agriculture and Carbon Sequestration | Bite Me | Episode 2 - Regenerative Agriculture and Carbon Sequestration Bite Me 36:51 |
“A conversation with Dr. Steven Adams, founder of US-based regenerative agriculture start-up Bison Underground. The company was one of the winning teams in the XPRIZE Carbon Removal Student Competition.In this episode, we’ll explore the story behind the company’s creation, how the technology works, and the bigger vision driving it forward. From how we define regenerative farming to why healthy soil might be one of our most overlooked climate solutions, this conversation breaks down complex science into everyday understanding. We’ll also talk about the real-world challenges of working with farmers, building a startup in the agricultural space, and what success could look like when business meets environmental impact.”
Can cement help fight climate change? | Tech for Climate Action | Can cement help fight climate change? Tech for Climate Action 26:04 |
“Cement is everywhere – from the buildings we live in to the roads we travel on – but it’s also one of the world’s biggest sources of CO₂ emissions.In this episode of the Tech for Climate Action Podcast, Ralph Cochrane speaks with Rob van der Meer of Cement Europe to uncover how the industry is tackling its carbon footprint.”
“We are familiar with climate policy to reduce emissions. We know about the policies to adapt to climate change. But can we successfully reduce the amount of CO2 in the atmosphere, and how do we create policies and incentives to invest in, and take advantage of, those technologies?Ottmar Edenhofer, Director of the Potsdam Institute for Climate Impact Research and chair of the European Scientific Advisory Board on Climate Change, talks to Tim Phillips about an aspect of climate policy that is becoming increasingly important.”
COP30 - A Breakthrough Moment for Carbon Removal? - with Chris Neidl | The CDR Policy Scoop | COP30 - A Breakthrough Moment for Carbon Removal? - with Chris Neidl The CDR Policy Scoop 30:02 |
“It’s that time of year again - COP30 is just around the corner. This year in Belém, Brazil, CDR has stepped up its game and will have its first-ever CDR Pavilion in the blue zone.This was made possible by CDR30, the Global Carbon Dioxide Removal Initiative, consisting of a unified global CDR community of over 60 organisations across the ecosystem. Their mission: elevating CDR’s essential role in climate action at COP30.A physical presence and strong coalition are a signal that carbon removal is finally stepping into the major leagues. But after years of questions about the role of carbon removal in the formal COP agenda, where exactly do we stand? What can we expect and hope for?That’s why we’re delighted to welcome Chris Neidl, Carbon Removal Lead with the High-Level Climate Champions. Among many other things, Chris has been working tirelessly to build support for carbon removal in the programming at COP.Join co-host Eve Tamme as she discusses with Chris what COP30 could mean for CDR and gains exclusive insights from the behind-the-scenes preparations.”
YOUTUBE VIDEOSSeparate CDR targets and how they can support innovation - Quarterly CDR policy update with remove | Carbon Gap “Access the CDR venture capital fundraising reporNavigating the European carbon removal policy ecosystem can be tricky. Both EU-wide and global CDR policies are relevant to all CDR startups, yet with constrained resources, many struggle to stay up to date. The Quarterly Policy Update series aims to address this need and provide this resource to a wide audience.For the third instalment of 2025, in partnership with remove, we highlight how separate targets in the EU Climate Law can better support innovation and entrepreneurship.”
Canadian Senate Committee on Fisheries and Oceans Holds Hearing on oCDR | Carbon to Sea “On October 26, 2025, Canada’s Senate Committee on Fisheries and Oceans held a hearing on ocean sequestration technologies and their use in Canada. Carbon to Sea’s Director of Global Policy, Diane Hoskins and Carbon Removal Canada’s Executive Director Na’im Merchant testified in front of the committee about the importance of government leadership and investment in ocean-based carbon dioxide removal (oCDR), and Canada’s unique opportunity to advance critical research and development.”
Gavin Newsom let’s meet at COP30 Brazil | Tito - AirMiners Field notes: Restoring the atmosphere (teaser) | Google Sustainability “Our new mini docu-series highlights three projects in Brazil that are each taking a unique approach to tackle CO2 and superpollutants.”
Carbon Removal Meets Compliance: Navigating the Legal Landscape for Biochar Projects | Peter Mayer | Grain Ecosystem “How do you make a carbon removal project legally sound, financeable, and built to last?In this session, our Co-Founder Jason Dodier was joined by Peter Mayer, Partner at Stairs Dillenbeck Finley Mayer PLLC (SDFM.nyc), for a deep dive into the legal backbone of biochar and carbon removal projects, from contracts to compliance.Together, they unpacked how to structure airtight offtake, lease, and feedstock agreements, safeguard credit integrity, navigate permitting and zoning, and align financing with investor protections.The discussion also covered risk management tools, insurance mechanisms, and the latest policy shifts (including FOFA, USDA 336, state biochar incentives, and tax credits) shaping the next generation of compliant, financeable carbon projects.”
This is CDR: Direct Air Carbon Capture Superstars | OpenAir “This was the second webinar in the OpenAir Collective’s 2026 Carbon Removal Challenge monthly webinar series!We proudly presented a panel of direct air capture (DAC) superstars from leading DAC organizations. They shared their perspectives on current events, career paths, experiences, and advice on working in DAC. We will have plenty of time for audience Q&A.”
Principles for Responsible and Effective Marine Carbon Dioxide Removal Development | High Level Panel for a Sustainable Ocean Economy “The paper outlines critical considerations for mCDR, including:High-quality, transparent scientific researchRobust monitoring and reporting frameworksMeaningful community engagementClear science-based regulatory pathways”
Weekly Carbon Removal Updates from 03 November - 09 November 2025 | Carbon Removal Updates BulletinDEADLINESFollow us on:Twitter | Bluesky | LinkedIn | YouTube | Substack | Podcast 1 | Podcast 2
Support us here:Share Carbon Removal Updates
© 2025 Carbon Removal Updates
548 Market Street PMB 72296, San Francisco, CA 94104
Unsubscribe 
| |
  |
|
