Neustark issues further 1613 tonnes of durable carbon removal

Swiss carbon storage and removal specialist neustark has issued another 1613 tonnes of CDR generated by surface or ex situ mineralization in mineral waste. These carbon removal tonnes were generated at various storage sites across Switzerland and Germany in 2024 – and verified by Gold Standard. Neustark will now deliver the credits to its CDR clients.

This takes neustark's total number of CDR credits verified by Gold Standard and issued to 2425 tonnes.

Carbon removal credits generated via mineralization in recycled concrete aggregate (RCA) in 2024 have already been issued for projects in Switzerland and Germany. Credits currently under verification include RCA projects in Switzerland from 2025, as well as concrete residual water and IBA. Carbon removal credits generated at sites outside Switzerland and Germany will be issued throughout 2026.

In total, neustark has net removed over 5700 tonnes of CO₂ to date (November 2025) since the deployment of its first commercial sites in 2023. 

This includes both commercial and non-commercial removals (e.g. R&D projects, testing and ramp-up of new plants). While the latter contribute to neustark’s climate impact, they are not certified for credit issuance for methodological-administrative reasons. These make up a minor (<5%) of total net tonnes removed.

«Neustark’s latest issuance reflects the kind of credible, durable climate impact we need to see scaling across engineered removals. As a standard setter, Gold Standard’s priority is to ensure projects follow clear rules and strong safeguards so every carbon credit delivers lasting value for people and nature. With this methodology also approved under the Core Carbon Principles of the ICVCM, project developers and buyers have additional assurance of high integrity climate action,» states Margaret Kim, CEO of Gold Standard.

How neustark’s solution works

Neustark’s technology repurposes concrete from demolished buildings and other mineral waste material (such as incinerator bottom ash and concrete residual water) as a carbon 'sink’.

Biogenic CO₂ is captured from biogas plants, then liquified and transported to partnering construction waste recycling sites. There, as an add-on to the existing recycling process, the carbon dioxide is injected into mineral waste. Neustark’s technology triggers an accelerated mineralization process, thus binding the CO₂ permanently to the pores and surface of the granules. The CO₂ is permanently stored and removed from the atmosphere. The carbonated aggregate can then be used by recyclers to build roads or to produce recycled concrete.

Neustark’s CDR is measurable, verified by the Gold Standard, and permanent. The mineralization process stores the captured CO₂ for thousands of years, and the risk of reversal is slim to none. Click here to learn bore about how we measure, report and verify our climate impact.

Revision of the Gold Standard methodology

In 2025 neustark, in collaboration with Gold Standard, conducted a revision of the methodology to enable the inclusion of a wider range of mineral waste materials (e.g., RCA, concrete residual water, IBA) and to expand baseline setting options. The new methodology, Carbon Mineralisation using Reactive Mineral Waste, introduces a more robust measurement, reporting, and verification (MRV) framework, aligned with broader developments in the CDR field - including, among others, the accounting of embodied and refined baseline emissions.

40 capture and storage projects in Switzerland, Germany, Austria, the UK, France, Italy and Liechtenstein are currently in operation – and 20+ new projects in the line-up for deployment in the next months. Our footprint and impact are growing quickly!