CO2-removal News

Peer-reviewed Publications

Streck et al. (2025): Considering durability in carbon dioxide removal strategies for climate change mitigation

Charlotte Streck, Sara Minoli, Stephanie Roe, Christian Barry, Matthew Brander, Solene Chiquier, Garrett Cullity, Peter Ellis, Jason Funk, Matthew J. Gidden, Matthias Honegger, Tracy Johns, Deborah Lawrence, Eve Tamme & Daniel Zarin,IN: Climate Policy, https://doi.org/10.1080/14693062.2025.2501267

This Perspective describes the various dimensions of Carbon Dioxide Removal (CDR) durability and interprets them in the context of current policy making.

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Peer-reviewed Publications

Sovacool et al. (2025): Exploring global climate intervention experiments: sociotechnical promises, innovation dynamics, and perceived co-impacts across 20 projects and pilots

Benjamin K. Sovacool, Chad M. Baum, Livia Fritz & Sean Low, IN: Sustainability Science, https://doi.org/10.1007/s11625-025-01696-6

Using techniques commonly applied in participatory action research and ethnography, the authors examine 20 specific cases of experimentation for a selection of carbon removal and solar radiation modification interventions. These experiments include engineering-based approaches such as stratospheric aerosol injection, cloud brightening, carbon–neutral cement, biochar, direct air capture, and enhanced rock weathering alongside ecosystems-based approaches such as afforestation, seagrass restoration, and coral reef protection. Based on extensive original research of these 20 experimental projects—including 118 semi-structured research interviews and naturalistic site-based observation—the authors explore four questions. Firstly, what are the actor coalitions surrounding each experiment? Secondly, what promises and expectations do those actors generate? Thirdly, what innovation dynamics and styles are emergent and evident here? Finally, what perceived co-impacts are expected (by actors) to occur with widespread prospective deployment?

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Peer-reviewed Publications

Bohn et al. (2025): CarbonFiberStone: A new carbon negative and cost-effective alternative to conventional building materials by fusing three different CDR technologies

Friedrich J. Bohn, Uwe Arnold, Ömer Bucak, Erik Frank, Leonie Schrafstetter and Kolja Kuse, IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/addfed

This study introduces CarbonFiberStone (CFS), a novel lightweight construction material, and assesses its carbon footprint in a specific buiding application. CFS is defined as a millimetre-thin bio-based carbon fiber fabric bonded to compression-resistant stone slabs using an adhesive. CFS is extremely resistant to compression and tension. The resulting stone powder from the stone cutting process is used for enhanced weathering. The wall element presented here incorporates a layer of biochar for insulation purposes. Using Life Cycle Assessment (LCA) and Techno-Economic Analysis (TEA), the authors compare five CFS-based building blocks with two conventional reinforced concrete blocks in single and multi-storey residential buildings.

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Peer-reviewed Publications

Nature – Sunet al. (2025): Enhanced continental weathering drove a transient oxygenation event during the largest Ediacaran carbon isotope excursion

He Sun, Yilin Xiao, Yangyang Wang, Fengtai Tong, Hai-Ou Gu, Can Ge, Fangyue Wang, Zhihui An, Erhao Shan, Meng Zhang, Tingyu Yang and Pengju Liu IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02420-z

The largest Ediacaran carbon isotope excursion (the Shuram excursion, SE) has been proposed to coincide with a transient oceanic oxygenation event. However, the mechanisms responsible for the SE and the associated oxygenation remain unclear. In this study, the authors investigated the role of silicate weathering during the SE by measuring Li isotope compositions from two suites of marine carbonates in the Ediacaran Doushantuo sections.

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Peer-reviewed Publications

Bohnet al. (2025): CarbonFiberStone: A new carbon negative and cost-effective alternative to conventional building materials by fusing three different CDR technologies.

Friedrich J. Bohn, Uwe Arnold, Ömer Bucak, Erik Frank, Leonie Schrafstetter and Kolja Kuse IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/addfed

This study introduces CarbonFiberStone (CFS), a novel lightweight construction material, and assesses its carbon footprint in a specific buiding application. CFS is defined as a millimetre-thin bio-based carbon fiber fabric bonded to compression-resistant stone slabs using an adhesive. CFS is extremely resistant to compression and tension. The resulting stone powder from the stone cutting process is used for enhanced weathering. The wall element presented here incorporates a layer of biochar for insulation purposes. Using Life Cycle Assessment (LCA) and Techno-Economic Analysis (TEA), the authors compare five CFS-based building blocks with two conventional reinforced concrete blocks in single and multi-storey residential buildings.

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Peer-reviewed Publications

Zaniboniet al. (2025): GIS-based multicriteria land suitability assessment for nature-based solutions for the enhancement of carbon sequestration in Emilia-Romagna, Italy

Andrea Zaniboni, Berit Balfors, Zahra Kalantari, Jessica Page, Patrizia Tassinari and Daniele Torreggiani IN: Land Use Policy, https://doi.org/10.1016/j.landusepol.2025.107632

A GIS-based multicriteria decision analysis (MCDA) is presented to evaluate the suitability of land for the implementation of nature-based solutions (NbS) to enhance carbon sequestration in Emilia-Romagna, Italy. The use of NbS has emerged as an effective strategy to sequester atmospheric carbon and improve environmental resilience. This study focuses on identifying the best NbS to maximise carbon sequestration for three environmental zones: urban, peri-urban and agricultural. The analysis identifies optimal locations for three area-specific NbS: street trees, green spaces and buffer strips. The region was divided into 30 × 30 m grid pixels, with each grid cell assigned a value from 1 (least suitable) to 5 (most suitable).

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Peer-reviewed Publications

Geertset al. (2025): The CDR potential of olivine-based enhanced rock weathering in marine systems: a case study for the coastal zone of France

Luna J.J. Geerts, Astrid Hylén and Filip J.R. Meysman IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/addf60

Marine enhanced rock weathering (mERW) is proposed as a method to achieve ocean alkalinity enhancement, thus increasing the CO2 storage capacity of seawater. Deposition of minerals in shallow waters results in enhanced weathering dissolution rates via the „benthic weathering engine“, thus inducing an additional alkalinity release from the seabed on top of the natural alkalinity efflux. However, the application potential of mERW as a carbon dioxide removal (CDR) technology remains uncertain. Here, the authors quantified the CDR potential via mERW through a spatially explicit model, using the coastal zone of France as a case study. They simulated the one-time addition of dunite (olivine-rich source rock) distinguishing between three sediment types: bedload, permeable, and cohesive seafloor environments.

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Peer-reviewed Publications

Nature – Deanet al. (2025): Old carbon routed from land to the atmosphere by global river systems

Joshua F. Dean, Gemma Coxon, Yanchen Zheng, Jack Bishop, Mark H. Garnett, David Bastviken, Valier Galy, Robert G. M. Spencer, Suzanne E. Tank, Edward T. Tipper, Jorien E. Vonk, Marcus B. Wallin, Liwei Zhang, Chris D. Evans and Robert G. Hilton IN: Nature, https://doi.org/10.1038/s41586-025-09023-w

Until now, CO2 and CH4 emitted from rivers were thought to be predominantly derived from recent (sub-decadal) biomass production and, thus, part of ecosystem respiration. Here the authors combine new and published measurements to create a global database of the radiocarbon content of river dissolved inorganic carbon (DIC), CO2 and CH4.

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Peer-reviewed Publications

Johnstonet al. (2025): Competitive Sorption of H2O and CO2 in Clay Mineral Interlayers

Cliff T. Johnston, Timothy S. Zwier, Tuan A. Ho, Guangping Xu, Yifeng Wang, Susan B. Rempe, Nabankur Dasgupta, Melissa Mills, Riley Welsh and David L. Bish IN: The Journal of Physical Chemistry C, https://doi.org/10.1021/acs.jpcc.5c01210

The first-reported competitive CO2–H2O sorption isotherms on a naturally occurring expandable clay mineral (saponite) exchanged with Na, K, and Cs at near ambient CO2 concentrations (1% CO2) are reported by combining ATR-FTIR spectroscopy with gravimetric sorption methods.

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