Eion

Mississippi, USA

works with American heartland communities to safely and permanently remove CO2.

Eion is a carbon removal company. We use the Earth’s natural mineralization cycle to remove carbon dioxide from the atmosphere safely, permanently, and verifiably. Eion works closely with farmers, ranchers, and existing agriculture systems to improve soil health and create jobs in rural communities.  
Country: United States
Status: Operational
Type: Enhanced Rock Weathering

ClimeRock

Colombes, France

Making 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.
Country: France
Status: In Development
Type: Enhanced Rock Weathering

Exterra Carbon Solutions X Deep Sky

Thetford Mines, Quebec, Canada

Mimics 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.
Country: Canada
Status: In Development
Type: Enhanced Rock Weathering

Vesta Field Pilot

North Sea Beach, Southampton, NY, USA

Coastline enhanced rock weathering

In July 2022,  the North Sea Beach Colony (NSBC) in Southampton, NY became home to the world’s first field pilot of Coastal Carbon Capture when they incorporated olivine sand into Phase 2 of their beach restoration project. The Town of Southampton, in collaboration with the NSBC, Vesta, and First Coastal, deployed 500 cu yd of olivine sand such that it comprised ~5% of the total sand volume that was placed.
Country: United States
Status: Operational
Type: Enhanced Rock Weathering

Lithos

San Francisco, CA, USA

Carbon capture for thriving farms.

Lithos accelerates mineral weathering by spreading basalt on croplands to increase dissolved inorganic carbon with eventual storage as ocean carbonates. Its technology uses novel soil models and machine learning to maximize CO₂ removal while boosting crop growth.
Country: United States
Status: Operational
Type: Enhanced Rock Weathering

greenSand

Enkhuizen, Noord-Holland, Netherlands

Removes 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.
Country: Netherlands
Status: Operational
Type: Enhanced Rock Weathering

BHP X Arca Nickel Mine

Mount Keith, Wiluna WA, Australia

Transform CO2 into rocks

Arca Climate Technologies and BHP have joined forces to launch a new pilot project at BHP’s Mt Keith Nickel West mine in Australia. The project, which is set to run for 18 months, will be focused on testing Arca’s innovative approach to carbon capture and storage using mine tailings. The goal of the project is to demonstrate that Arca’s methodology can effectively capture and permanently store atmospheric carbon dioxide, while also ensuring the integration of the technology is safe within an operating mine.
Country: Canada
Status: In Development
Type: Enhanced Rock Weathering

Silicate

Wellingtonbridge, Wexford, Ireland
Enhanced weathering trial using returned concrete as an enhanced weathering feedstock.
Country: Ireland
Status: In Development
Type: Enhanced Rock Weathering

Carbon Drawdown Initiative

Fürth, Germany

Extensive 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.
Country: Germany
Status: Operational
Type: Enhanced Rock Weathering

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.
Country: United Kingdom
Status: In Development
Type: Enhanced Rock Weathering