UNDO – Enhanced Rock Weathering in the UK
Basalt dust locking away CO2 and helping British soils
Enhanced Rock WeatheringCounts towards net zeroCarbon RemovalCounts towards net neutralityBuyer Protection Carbon Removal
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UNDO – Enhanced Rock Weathering in the UK
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Largest ERW programme in the UK
#250,000
Potential tonnes of CO2 removal per year#362
Farms enrichedUNDO runs the largest Enhanced Rock Weathering (ERW) programme in the United Kingdom. Each season, it can remove up to 250,000 tonnes of CO₂ by spreading locally sourced basalt on farmland.
The basalt dust reacts with rain-water and soil acids, turning CO₂ into stable minerals that stay locked away for more than 10,000 years. Farmers see extra benefits: the rock adds nutrients, raises soil pH and can reduce the need for chemical fertilisers.
UNDO partners with regional quarries and uses standard farm machinery, keeping transport emissions low and achieving a life-cycle carbon efficiency above 90 %. Independent scientists and the Puro.earth methodology verify every tonne removed, giving buyers high-integrity carbon credits backed by clear data.
The basalt dust reacts with rain-water and soil acids, turning CO₂ into stable minerals that stay locked away for more than 10,000 years. Farmers see extra benefits: the rock adds nutrients, raises soil pH and can reduce the need for chemical fertilisers.
UNDO partners with regional quarries and uses standard farm machinery, keeping transport emissions low and achieving a life-cycle carbon efficiency above 90 %. Independent scientists and the Puro.earth methodology verify every tonne removed, giving buyers high-integrity carbon credits backed by clear data.
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What is Enhanced Rock Weathering?
Enhanced rock weathering is a carbon removal method that involves spreading crushed rocks over farmland. When rainwater, which naturally absorbs CO2 from the air, comes into contact with these rocks, a chemical reaction occurs that turns the CO2 into stable minerals. These minerals then lock away the carbon for thousands of years, effectively reducing CO2 levels in the atmosphere.
The Intergovernmental Panel on Climate Change (IPCC) has recognised enhanced weathering as an effective carbon removal method. Major companies like Stripe, Shopify, and Microsoft have invested in enhanced weathering projects, demonstrating strong support for its potential in combating climate change.
The Intergovernmental Panel on Climate Change (IPCC) has recognised enhanced weathering as an effective carbon removal method. Major companies like Stripe, Shopify, and Microsoft have invested in enhanced weathering projects, demonstrating strong support for its potential in combating climate change.
Research
Crop benefits of enhanced rock weathering
Enhanced rock weathering results in higher crop yields and improved crop health, new research has shown.Potential CO2 removal from enhanced weathering
Basalt soil amendment could remove CO2 and enhance ecosystem carbon storage, a promising climate solution.Project Certifications and Claims
Puro.earth
This project has successfully implemented a Puro-approved methodology: Enhanced Rock Weathering, Edition 2022, Version 2.
AI Quality Framework
Senken follows a 500+ datapoint AI Quality Framework to select and onboard project developers. Only 5% of the projects we assess score high enough to make it into customer portfolios.
Socioeconomic Impact
Beyond agriculture, UNDO is committed to building a green economy from the ground up through its Green Jobs Pathway. Instead of relying on imported machinery or external expertise, UNDO invests in local talent by partnering with regional contractors and training workers in emerging climate-smart practices. This commitment fosters meaningful employment, builds community resilience, and supports the transition of rural economies toward sustainable livelihoods.
Environmental Impact
UNDO’s enhanced rock weathering process delivers measurable climate and ecological benefits. By spreading nutrient-rich silicate rock on agricultural land, the project accelerates the natural carbon cycle, removing CO2 from the atmosphere and locking it away for tens of thousands of years.<br><br>
As the crushed rock breaks down, it releases essential minerals like magnesium, calcium, and potassium, enriching the soil and supporting healthier, more productive crops. At the same time, the process produces alkaline bicarbonate ions that are eventually carried to the oceans, where they help combat acidification and support marine biodiversity by aiding shell-forming organisms.<br><br>
This dual impact, on land and at sea, makes UNDO’s approach a powerful nature-aligned solution to both climate change and ecosystem degradation.<br><br>
Senken's Take
UNDO’s enhanced weathering solution stands out as one of the most promising approaches for durable, nature-aligned carbon removal.
By accelerating a natural geochemical process, UNDO removes CO2 from the atmosphere and locks it away for hundreds of thousands of years. Unlike tree-planting initiatives, the carbon captured through enhanced weathering is effectively permanent. The crushed silicate rock, a by-product of existing industry, is spread on farmland within weeks—rapidly initiating both carbon removal and soil enrichment.
Beyond durability and speed, the approach is highly energy-efficient. With up to 95% carbon efficiency in operations, UNDO ensures that the climate benefits are not offset by emissions. Its use of local farm machinery and partnerships with rural contractors also minimizes environmental disruption and amplifies positive socio-economic impact.
Senken recommends this project for its scientific integrity, strong co-benefits for agriculture and oceans, and its scalable potential to remove over a billion tonnes of CO2. A compelling example of how carbon removal can be both impactful and responsible.
By accelerating a natural geochemical process, UNDO removes CO2 from the atmosphere and locks it away for hundreds of thousands of years. Unlike tree-planting initiatives, the carbon captured through enhanced weathering is effectively permanent. The crushed silicate rock, a by-product of existing industry, is spread on farmland within weeks—rapidly initiating both carbon removal and soil enrichment.
Beyond durability and speed, the approach is highly energy-efficient. With up to 95% carbon efficiency in operations, UNDO ensures that the climate benefits are not offset by emissions. Its use of local farm machinery and partnerships with rural contractors also minimizes environmental disruption and amplifies positive socio-economic impact.
Senken recommends this project for its scientific integrity, strong co-benefits for agriculture and oceans, and its scalable potential to remove over a billion tonnes of CO2. A compelling example of how carbon removal can be both impactful and responsible.
Largest ERW rollout in the UK
Operates with >90 % carbon efficiency
Permanence >10,000 years
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