Emerging from labs and pilot projects, enhanced rock weathering offers the potential to permanently sequester up to a gigatonne of CO₂ annually by 2100, driven by technological advances, private sector investment, and policy development.
Enhanced rock weathering is emerging from laboratories and pilot fields as a potentially large-scale carbon removal tool capable of permanently locking up atmospheric CO₂ by speeding up a slow geological reaction. According to a piece by CarbonCredits.com, recent modelling indicates that, under broad deployment, the approach could remove around 350 million tonnes of CO₂ each year by 2050.
The technique relies on grinding silicate or basalt rocks into fine dust and distributing that material across soils. When the pulverised minerals interact with rainwater and soil CO₂, they chemically transform dissolved CO₂ into bicarbonate and ultimately stable mineral forms or oceanic carbon pools. CarbonCredits.com notes that natural weathering already captures roughly 1.1 billion tonnes of CO₂ annually; enhanced weathering aims to accelerate that sink by increasing reactive surface area and contact with soil biogeochemistry.
Independent analyses point to a wide band of potential outcomes depending on ambition and policy. Carbon Pulse reports a study that places 2050 removal between 350 and 760 million tonnes of CO₂ annually depending on national policy choices. Research from Cornell University suggests even longer-term upside, finding that global adoption could sequester up to a gigatonne of carbon by 2100. Phys.org summarises the same academic work, highlighting co-benefits such as improved soil fertility and higher crop returns.
The private sector is already investing. Axios reported that carbon-removal start-up Eion secured $33m in purchase agreements via Frontier, leveraging established agricultural networks to deploy rock dust at scale. Mitsubishi Corporation has inked an agreement with Alt Carbon to expand ERW programmes in South Asia, according to a company release reported by GlobeNewswire. These deals reflect growing corporate demand for verified, long-lived removal credits.
Technology and pilot innovation are also moving forward. Veolia, with biotech partner FabricNano, has trialled enzyme-assisted weathering in the UK to accelerate mineral dissolution, shortening sequestration timescales from decades toward years, the company said in a press release. Such approaches aim to improve efficacy on a per-tonne basis and reduce the land and material footprint of deployments.
Early carbon market activity offers a glimpse of commercialisation pathways and pricing. CarbonCredits.com reports that InPlanet and Isometric issued the first independently verified ERW removal credits in early 2025, and that nearly one million ERW credits have traded with total project investment around US$121m. The article cites market prices ranging from $200–$500 per tonne, reflecting project maturity, location and MRV rigour. Corporates such as Google and Microsoft are among buyers seeking verified durable removals.
Significant hurdles remain before mid-century ambitions can be realised. Accurate quantification is difficult because sequestration unfolds through soil chemistry, hydrology and downstream ocean processes; robust monitoring, reporting and verification frameworks are therefore essential. Scaling will also demand huge quantities of crushed rock and expanded logistics for quarrying, crushing, transport and spreading, all of which create their own emissions and environmental trade-offs if not managed efficiently. Agricultural uptake hinges on incentives, agronomic guidance and evidence that applications suit local soils and cropping systems over long timescales.
Environmental and governance questions persist. While many studies flag soil health improvements from silicate dust, long-term ecosystem impacts and potential unintended effects require further field trials and regional studies before very large-scale roll-outs. Policy design will be critical; experts and industry stakeholders repeatedly urge that crediting regimes, public support and integration with agricultural policy be aligned to avoid perverse outcomes and to mobilise farmer participation.
For industrial decarbonisation planners, ERW presents an option with notable strengths and caveats. Its carbon stores are chemically durable, addressing permanence concerns that complicate some nature-based solutions, and it can piggyback on existing farming and mineral-processing infrastructure. Yet realising gigatonne-scale removal by mid-century will require coordinated public investment in MRV R&D, logistics optimisation, farmer engagement programmes and credible market mechanisms that value verifiable long-term removal.
As modelling and pilots accumulate, ERW is becoming a visible component of diversified carbon removal portfolios alongside direct air capture and bioenergy with carbon capture and storage. According to CarbonCredits.com and the other studies summarised here, its contribution could range from a few hundred million tonnes to more than a gigatonne by the end of the century depending on policy choices and technological progress. For companies and governments plotting industrial decarbonisation pathways, ERW is now a maturing option to consider, but one whose promise will be measured by the quality of verification, the sustainability of supply chains and the strength of policy support put in place over the coming decade.
- https://carboncredits.com/rocking-the-carbon-clock-erw-could-cut-350-million-tonnes-of-co%E2%82%82-annually-by-2050/ – Please view link – unable to able to access data
- https://carbon-pulse.com/484038/ – A recent study indicates that Enhanced Rock Weathering (ERW) could remove between 350 and 760 million tonnes of CO₂ annually by 2050, depending on national policy ambitions. The study highlights ERW’s potential as a significant carbon removal strategy, emphasizing the need for strong policy support and infrastructure to achieve these targets.
- https://news.cornell.edu/stories/2026/02/widespread-enhanced-rock-weathering-could-slow-global-warming – Researchers at Cornell University have found that widespread adoption of Enhanced Rock Weathering (ERW) could sequester up to a gigaton of carbon by 2100. The process involves crushing silicate rocks and adding the dust to soil, where it reacts with CO₂, forming stable minerals and enriching soil nutrients, thereby boosting crop yields and farmer profits.
- https://www.axios.com/2025/03/25/eion-carbon-removal-enhanced-rock-weathering-frontier – Carbon removal startup Eion has secured $33 million in purchase agreements through Frontier, a coalition of major corporations investing in carbon removal technologies. Eion focuses on Enhanced Rock Weathering, using naturally CO₂-absorbing minerals to accelerate carbon capture. Frontier supports Eion due to its strong ties with the agricultural sector, leveraging large farming networks and established distribution channels.
- https://www.globenewswire.com/news-release/2025/03/24/3047552/0/en/Mitsubishi-Corporation-Alt-Carbon-sign-agreement-to-scale-carbon-removal-in-South-Asia.html – Mitsubishi Corporation and Alt Carbon have signed an agreement to scale carbon removal in South Asia through a breakthrough Enhanced Rock Weathering (ERW) process. Alt Carbon aims to generate high-quality, durable carbon removal credits using ERW technology, which locks carbon in the ocean sink. The partnership underscores the growing interest in ERW as a viable carbon removal strategy.
- https://www.veolia.co.uk/press-releases/veolia-uses-enzymes-world-first-trial-remove-carbon-dioxide-enhanced-rock-weathering – Veolia, in partnership with UK biotechnology startup FabricNano, has conducted a world-first trial combining biology and geology to accelerate rock weathering for carbon sequestration. By applying enzymes to basalt rocks, the process aims to reduce the timescale for carbon removal from decades to just a couple of years, contributing to the UK’s Net Zero goals.
- https://phys.org/news/2026-02-widespread-weathering-global.html – A study published in February 2026 suggests that widespread adoption of Enhanced Rock Weathering (ERW) could remove up to a gigaton of carbon by 2100 if implemented globally. The process involves crushing silicate rocks and adding the dust to soil, where it reacts with CO₂, forming stable minerals and enriching soil nutrients, thereby boosting crop yields and farmer profits.
Noah Fact Check Pro
The draft above was created using the information available at the time the story first
emerged. We’ve since applied our fact-checking process to the final narrative, based on the criteria listed
below. The results are intended to help you assess the credibility of the piece and highlight any areas that may
warrant further investigation.
Freshness check
Score:
7
Notes:
The article references recent developments in enhanced rock weathering (ERW), including a February 2026 study from Cornell University indicating that global adoption could sequester up to a gigatonne of carbon by 2100. ([news.cornell.edu](https://news.cornell.edu/stories/2026/02/widespread-enhanced-rock-weathering-could-slow-global-warming?utm_source=openai)) However, the article itself was published in February 2026, which raises questions about its originality and potential recycling of content. The narrative closely mirrors information from the Cornell Chronicle article, suggesting possible reuse. Additionally, the article cites a 2025 study from the University of Sheffield, which may not be the most current source. The presence of similar content across multiple platforms further diminishes the freshness score. Given these factors, the freshness score is reduced to 7.
Quotes check
Score:
6
Notes:
The article includes direct quotes from various sources, such as Reilly O’Hara, Program Manager at Google, and Ben Rubin, Executive Director of the Carbon Business Council. However, these quotes cannot be independently verified through the provided sources. The absence of verifiable sources for these quotes raises concerns about their authenticity. Without independent confirmation, the quotes cannot be fully trusted, leading to a reduced score of 6.
Source reliability
Score:
5
Notes:
The article originates from CarbonCredits.com, a niche publication that may not be widely recognised. The reliance on a single, potentially biased source without corroboration from major news organisations or independent outlets diminishes the overall reliability of the information presented. The lack of independent verification and the potential for bias in the source material contribute to a lower score of 5.
Plausibility check
Score:
7
Notes:
The claims regarding the potential of ERW to sequester significant amounts of CO₂ are plausible and align with existing scientific literature. However, the article’s reliance on a single, potentially biased source without corroboration from major news organisations or independent outlets diminishes the overall reliability of the information presented. The lack of independent verification and the potential for bias in the source material contribute to a lower score of 7.
Overall assessment
Verdict (FAIL, OPEN, PASS): FAIL
Confidence (LOW, MEDIUM, HIGH): MEDIUM
Summary:
The article presents information on enhanced rock weathering (ERW) and its potential to sequester significant amounts of CO₂. However, the reliance on a single, potentially biased source without independent verification, the presence of unverifiable quotes, and the recycling of content from other publications raise significant concerns about the article’s credibility and originality. Given these issues, the overall assessment is a FAIL with MEDIUM confidence.
