Rock Weathering

Olivine is perhaps the oldest way nature removes CO2. The mineral is almost everywhere. About half of the earth’s crust consists of the greenish rocks. As they weather and break down into sand, they store carbon dioxide. We speed up this natural process simply by grinding it. Using olivine to protect coastlines has a systemic advantage: it also counters the acidification of the oceans and keeps the rising water out. But also on land, the olivine sand has many uses. Multi-potent, we call this. This is why we envision green beaches and green sand around the world.

Photo by Nikoline Arns


As sea levels are rising and beaches are being swept away, we protect beaches and coast lines around the world with olivine grinded into sand, just like on the actual natural olivine beach in Hawaii shown below. Deployment also works in shallow coastal waters, where underwater sand dunes dampen the destructive power of increasingly stronger waves. We are protecting our shorelines while reducing ocean acidity and permanently remove CO2. On land, olivine is used as the sand-of-choice, as well as to enrich soils worldwide. Science estimates the potential of olivine between 500 and 5000 gigaton. Seriously.

The green sand beach “Papakolea” in Hawaii


With our friends at Greensand, Green Minerals, Project Vesta and NIOZ we are working on the first olivine beach on the Dutch island of Texel. We work with Project Vesta on carbon accounting and refining the weathering rate in seawater. On land-based olivine use, proof of concept has been extensively delivered by a growing number of applications, like in this project (Dutch article) where 20.000 ton of olivine is already removing about half a million kg of CO2 per year.

Global Conferences

Climate Cleanup with parters organised two global enhanced weathering science to action conferences. The last one took place on May 12, 2021. The conference materials can be found here.


Curious about the natural power of olivine?


You will find a lot of scientific research and visuals with our friends at Project Vesta.

The PDF links to Taylor et al (2016), who estimate that olivine weathering can remove between 500 and 5000 gigaton CO2 (a reduction of 30-300 ppm in atmospheric CO2) from the atmosphere this century. 

For governement (Dutch)

Deltaris – Dutch report – Toepassing van olivijn in RWS-werken 

Negative emission potential (Dutch)

PBL – Dutch report – Negatieve emissies Technisch potentieel, realistisch potentieel en kosten voor Nederland

Join The 1500 Club

Take part in our plan to draw 1500 gigaton CO2 out of the atmosphere this century and restore the global carbon balance. With 1500 people we aim to remove the 1500 gigaton of extra CO2 in our atmosphere, using nature based solutions. This 1500 Club is by and for parents, entrepreneurs, investors, youth, decision makers and anyone who wants to suck CO2 with us. Take part in our plan to draw 1500 gigaton CO2 out of the atmosphere as soon as possible and restore ecosystems and the global carbon balance.