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Nature – Mariani et al. (2025): The combined impact of fisheries and climate change on future carbon sequestration by oceanic macrofauna

Gaël Mariani, Jérôme Guiet, Daniele Bianchi, Tim DeVries, Nicolas Barrier, Marc Troussellier and David Mouillot, IN: Nature Communications, https://doi.org/10.1038/s41467-025-64576-8

Although the role of marine macrofauna in the ocean carbon cycle is increasingly understood, the cumulative impacts of fisheries and climate change on this pathway remain overlooked. Here, using a marine ecosystem model, the authors estimate that each degree of warming reduces macrofauna biomass and carbon export by 4.2% and 2.46%, respectively.

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Nature – Malakar et al. (2025): Stakeholders have knowledge priorities beyond local impacts for responsible marine-based carbon dioxide removal in Tasmania

Yuwan Malakar, Kerryn Brent, Talia Jeanneret and John Gardner, IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02775-3

Novel carbon dioxide removal (CDR) approaches are being developed to help achieve the Paris Agreement temperature targets. Beyond technological challenges, their deployment in specific locations can be shaped by local stakeholders’ perspectives. Here the authors use ocean alkalinity enhancement (OAE), a marine-based CDR approach, to explore what stakeholders need to develop informed opinions about these technologies. They employed a bottom-up engagement approach, interviewing 23 stakeholders in Tasmania, Australia. While some participants held preliminary views, all expressed a need for more information regarding technological feasibility, environmental and community impacts, governance, and OAE’s role in climate policy.

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Niveditha & Palanisamy (2025): Upcycling iron-rich industrial waste into a carbon-sequestering composite binder through optimized carbonation curing for structural applications

Niveditha M. and Palanisamy T., IN: International Journal of Environmental Studies, https://doi.org/10.1080/15623599.2025.2556259

Background: Steel production generates large quantities of mill scale, a by-product rich in iron oxides, with global generation estimated at 13.5 million tons annually. Simultaneously, Portland cement production, essential for concrete, contributes nearly 8% of global CO₂ emissions, highlighting the urgent need for low-carbon alternatives. Iron carbonate (FeCO₃), typically regarded as a corrosion product, offers an underexplored opportunity for deliberate synthesis in binders to achieve both structural performance and CO₂ sequestration. Repurposing mill scale into carbon-sink binders thus provides a dual pathway for waste valorization and climate change mitigation, while advancing circular economy and industrial symbiosis principles. Methods: A composite binder was developed using mill scale, fly ash, metakaolin, and limestone, with oxalic acid employed as a chelating agent to promote iron dissolution and carbonate formation.

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Peer-reviewed Publications

Oguntuyaki & Morrill (2025): Assessing the CO₂ sequestration potential of serpentinized ultramafic rocks in Baie Verte, Newfoundland

Timilehin A. Oguntuyaki and Penny L. Morrill, IN: International Journal of Greenhouse Gas Control, https://doi.org/10.1016/j.ijggc.2025.104444

This study investigated the CO₂ sequestration potential of serpentine from Baie Verte, NL. Serpentinized ultramafic rocks of the Baie Verte Oceanic Tract were tested using two experimental approaches: a two-phase flow-through system, simulating mineral dissolution of near-surface water-rock reactions in serpentinite-rich systems; and a three-phase batch system, simulating surficial carbon dioxide removal (CDR).

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Jia et al. (2025): Gridded forest carbon sinks and carbon removal projections from 2020 to 2060 in China

Min Jia, Shu Ye, Li Zhang, Pengcheng Wu, Ni Huang, Yanfeng Bai, Jianhui Ruan, Zhuoming He, Mingyu Li, Shaoyuan Chen, Li Wang, Bofeng Cai, Jinnan Wang, IN: Journal of Environmental Management, https://doi.org/10.1016/j.jenvman.2025.126617

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Clarifying the forest carbon sink in the future and detailing its offsetting effect on CO₂ emissions are of great significance to China’s Dual-Carbon strategy. This study has innovatively developed a comprehensive analysis to simultaneously consider grid-specific (10 km × 10 km), yearly, and nationwide forest carbon sink and CO₂ emissions to further explore the carbon offset effects of China’s forest resources from 2020 to 2060 under scenario combinations integrated by Shared Socioeconomic Pathways (SSPs) and Representative Concentration Pathways (RCPs).

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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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Cajada et al. (2025): Regionally-Dependent Arctic Sea Ice Recovery to CO₂ Removal

M. Inês Cajada, Seok-Woo Son, Jaeyoung Hwang, Hyo-Seok Park and Soon-Il An, IN: Earth’s Future, https://doi.org/10.1029/2024EF005597

The decline of Arctic sea ice area (SIA) has accelerated in recent decades and is projected to continue in a warming climate. This trend can be reversed by reducing atmospheric CO₂ concentrations. A large-ensemble model experiment, in which atmospheric CO₂ concentrations are quadrupled and then reduced to the initial state, shows an overall recovery of Arctic SIA by CO₂ removal, but at a slower rate than its decline to CO₂ increase.

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Peer-reviewed Publications

Upeksha et al. (2025): Costs and benefits of afforestation with renewable electricity-based desalination: Case study for Egypt

Upeksha Caldera, Andreas Mühlbauer, Mai ElSayed, Arman Aghahosseiini, Christian Breyer IN: Smart Energy, 17, https://doi.org/10.1016/j.segy.2025.100174

Aim of this research is to show how Egypt can make use of its plentiful renewable resources, available land area, and access to the sea, to establish cost-effective afforestation irrigated with renewable energy-based seawater desalination for land degradation mitigation.

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Nature – Gui et al. (2025): Biochar-amended soil can further sorb atmospheric CO2 for more carbon sequestration

Xiangyang Gui, Xiaoyun Xu, Zehong Zhang, Liyang Hu, Wenfeng Huang, Ling Zhao, Xinde Cao IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-024-01985-5

This work is aimed to explore if the extra sorption of carbon dioxide (CO2) exists in the biochar-amended soil, which has not yet received attention. Here the authors put biochar and mineral-rich biochar into soils to perform laboratory CO2 sorption experiments.

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Peer-reviewed Publications

Liu et al. (2024): Improving soil carbon sequestration stability in Siraitia grosvenorii farmland through co-application of rice straw and its biochar

Xuehui Liu, Yu Yang, Yaqi Xie, Yicheng Zeng, Lening Hu, Ke Li IN: Frontiers in Plant Science, 15, doi: 10.3389/fpls.2024.1470486

This study was designed to investigate the impact of different return-to-field methods of rice straw on the transformation between different carbon components in the soil of Siraitia grosvenorii fields. The authors hypothesize that rice straw and its biochar, as soil amendments, can influence the transformation and cycling of different carbon components in the soil of S. grosvenorii fields through various return-tofield methods. Rice straw, rice straw biochar, and „rice straw + rice straw biochar“ were applied as additives in a 2-year field experiment.

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