Making Permanent, Scalable Carbon Removal a Reality
We are turning ERW into a global movement
We combine innovative monitoring technology and careful planning to create financially viable enhanced rock weathering (ERW) projects that can scale to provide the volumes of CO₂ removal needed to address the climate crisis.
Europe’s 1st verified ERW carbon credits, and 2nd worldwide.
Verified by:
Our Partners
What is Enhanced Rock Weathering?
ERW uses natural soil processes to store carbon dioxide as stable bicarbonate. The reaction of recycled rock powder with water and carbon dioxide binds the carbon in solid form which remains in the ocean for thousands of years.
ERW satisfies the four most common problems with carbon removal:
1
Additionality
Farmers know what they would normally spread on their fields, allowing for an accurate baseline calculation
2
Leakage
Since ERW uses quarry by product materials, there is no displacement of economic activity
3
Permanence
Once weathering products reach the ocean, the carbon is stable for thousand of years
4
Double counting
ZeroEx is the sole seller of its ERW carbon credits
Our measurement technology
ZeroEx has pioneered the use of ion exchange resin devices, known as self-integrating accumulators (SIAs), for the measurement, reporting, and verification (MRV) of carbon removal through ERW. SIAs provide time-integrated measurements of the dissolved molecules produced by weathering, making them the most precise and cost-effective method for tracking true carbon sequestration in ERW.
TIME-INTEGRATED ION FLUX DATA
Measures weathering products exported with the soil leachate.
HIGHER ACCURACY, LOWER MRV COSTS
Water-based monitoring made as easy as soil-based measurements.
SCIENCE-BASED
Scientifically validated in numerous peer-reviewed studies.
GLOBALLY DEPLOYED
2,000+ SIAs currently installed around the world.
Our measurement technology
ZeroEx has pioneered the use of ion exchange resin devices, known as self-integrating accumulators (SIAs), for the measurement, reporting, and verification (MRV) of carbon removal through ERW. SIAs provide time-integrated measurements of the dissolved molecules produced by weathering, making them the most precise and cost-effective method for tracking true carbon sequestration in ERW.
How an ERW deployment works:
By spreading basalt rock powder over agricultural fields, ERW projects maximize the surface area of rock available for weathering, accelerating a geological process to the time frame of a few years
1
Rock Selection
We source unused rock powder as close to farms as possible and optimize for greatest sequestration potential
2
SIA Device Install
Pioneering technology and industry-leading measurement protocols generate accurate and verifiable carbon credits
3
Rock Spreading
Precision powder spreading with GPS tracking ensures optimal coverage and transparency
4
Rock Weathering
Rock powder captures CO₂ while enhancing soil fertility. Removal measured in soil, water, and SIAs.
Scalable carbon removal
ERW can be replicated globally using existing infrastructure and simple, reliable SIA measurements.
Building knowledge through global collaborations
We partner with CDR developers and ERW researchers around the world
-
Commercial Projects
Goiás, Brazil
Partnership with Anglo American to evaluate SIAs for large-scale deployment in tropical conditions
Piracicaba, Brazil
Collaboration with ERW developer InPlanet to test SIAs for future use in their projects.
Mogi Guaçu, Brazil
Collaboration with project developer Mombak to pilot the use of ERW and SIAs as an extension of their reforestation business.
Cameroon
Collaboration with Prof. Samuel Tetsopgang of the University of Bamenda to assess the sequestration potential of feedstock in western Cameroon.
Ukraine
Pilot project to demonstrate the viability of ERW as CDR strategy in Ukraine.
Virgínia, US
Collaboration with Yale University to test the performance of SIAs against several other MRV methods.
Minnesota, US
Field trial conducted by Cascade Climate & Carleton College to test the performance of SIAs in comparison to conventional MRV methods.
Washington, US
Comparison of SIAs to alkalinity sensors in a field trial funded by the Cascade Climate ERW Field Data Partnership Grant in collaboration with Basic Dust and Prof. Christiana Dietzen.
United Kingdom
Mesocosm experiment in collaboration with Novonesis to test whether carbonic anhydrase (CA) enzyme can speed up dissolution of ERW feedstock.
Germany
ERW deployment using carbon-neutral byproduct material with very low heavy metal concentrations.
Germany
Field trials including > 200 SIAs, testing different installation methods and depths on three research plots in the Eifel region in Germany.
Germany
Assessment of potentially toxic elements in ERW funded by the Climate Intervention Environmental Impact Fund (CIEIF).
