Eion
Mississippi, USAworks with American heartland communities to safely and permanently remove CO2.
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Project Type: Enhanced Rock Weathering
ClimeRock
Colombes, FranceMaking ERW accessible, starting with France
ClimeRock is a French startup focused on Enhanced Rock Weathering (ERW) – a natural solution that captures carbon dioxide from the air by spreading finely ground rocks over large areas of land. ERW also improves soil health and productivity for farmers. ClimeRock aims to make ERW accessible to farming lands globally, starting with France. ERW utilizes abundant natural resources and has the potential to scale up rapidly to reach net-zero emissions.
Exterra Carbon Solutions
Thetford Mines, Quebec, CanadaMimics the natural weathering of rocks, significantly accelerating CO2 mineralization
Exterra reduces the environmental impact of carbon emissions and raw material production by developing projects that transform mineral waste and CO2 into carbonate minerals and byproducts using our proprietary chemical process. The carbonate minerals are used on-site for site rehabilitation, where the CO2 remains locked away for millennia, avoiding the climate impact of atmospheric greenhouse gasses.
Vesta
Southampton, NY, United StatesCoastline enhanced rock weathering
Vesta’s mission is to further the science of Coastal Carbon Capture and galvanize global deployment. Coastal Carbon Capture harnesses the power of the oceans to accelerate the Earth’s natural long-term carbon dioxide removal process and enhance coastal resilience. Vesta is a Public Benefit Corporation, a mission-driven company dedicated to leaving a world in which all can thrive. Part of the funding for our scientific research is from the Coastal Carbon Capture Impact Fund, a 501(c)(3) public charity.
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Lithos
Chicago, IL, USAUsing ERW in the American Midwest.
We remove atmospheric carbon for a fraction of the cost while increasing crop yields. Our process is highly efficient, increases soil health, and repurposes post-industrial waste. Then we sell the carbon credits to companies and split revenue with our regenerative growers. With a world-class team leveraging expertise in soil chemistry, agronomy, geochemistry, machine learning, and logistics, we are engineering the most cost-effective, and scientifically rigorous solution to enhanced rock weathering at scale.
greenSand
Enkhuizen, Noord-Holland, NetherlandsRemoves CO2 using Olvine
greenSand focuses on removing certified CO2 using the mineral Olivine. Removal by reactions with olivine is an attractive option, because it is widely available and reacts easily with the (acid) CO2 from the atmosphere. When olivine is crushed, it weathers within a couple of years, depending on the grain size and humidity. The reaction is exothermic but slow. The end-products of the reaction are silicon dioxide, magnesium carbonate, and small amounts of iron oxide.
Arca
Vancouver, BC, CanadaTransform CO2 into rocks
We remove excess CO₂ from the atmosphere, and transform it into rocks – naturally storing it for millennia. We can still reverse climate change if we act fast, and develop solutions that scale. For our part, we capture and store CO2 permanently by speeding up the natural process of carbon mineralization. And because our technology uses the waste from critical metal mines, it keeps a light footprint while supporting the clean energy transition.
Silicate
Wellingtonbridge, Wexford, Ireland
Enhanced weathering trial using returned concrete as an enhanced weathering feedstock.
Carbon Drawdown Initiative
Fürth, GermanyExtensive greenhouse experiment to investigate MRV approaches for rock weathering.
In their extensive greenhouse experiment, the carbon drawdown initiative is trying to find ways to measure the CDR effects caused by adding rock dust to agricultural soils on short timescales (months to years). Overall, they record 4.5 million data points per day. Their mission is to find a short term (month/years) measuerment approach for ERW.
The Enhanced Rock Weathering Demonstrator
Manor Oaks Road/Blagden Street, Sheffield S2 5QZ, UK
The project will explore amending soils with crushed calcium and magnesium rich silicate rocks from waste quarry fines to accelerate natural CO2 sequestration processes. It will provide the first integrated whole system assessment of the science, societal and scalability opportunities and challenges of enhanced rock weathering deployment in UK agriculture. Field sites are the Plynlimon Experimental Catchments (mid-Wales), Rothamsted Research’s North Wyke grassland experimental platform in Devon, and their cutting-edge arable research facility in Harpenden, Hertfordshire.