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Direct Air Capture, powered by nature


A natural carbon sink

Mineral carbonation, the reaction of CO₂ with metal oxides to create carbonates, occurs naturally around the world.


Limestone, or calcium carbonate, comprises approximately 15% of the Earth's sedimentary crust, making it a critical global carbon sink.


By harnessing the natural ability of limestone and similar carbonates, we can permanently remove CO₂ at the gigatonne level.

Limestone Rock


We need zero carbon lime

If we are to enhance this natural process to remove atmospheric CO₂, we need to produce zero carbon calcium oxide, commonly known as lime. And lots of it. This can act as a “carbon sponge”, absorbing atmospheric CO₂ by forming calcium carbonate.

However, current methods for producing 1 tonne of lime emit approximately 1 tonne of CO₂, negating any environmental benefit from mineral carbonation.

Lime Kilns


Greener, circular & modular lime production, allowing lime to act as a carbon sink

Renewably powered kilns

Our advanced kilns can run on renewable energy sources, with a proprietary process allowing the easy capture of CO₂ for permanent sequestration by our partner organisations.

Avoiding harmful quarrying

We don’t use virgin limestone. Quarrying causes significant environmental damage; our process does not require it.

Allowing nature to work its magic

Our lime will naturally undergo mineral carbonation. This means for every 10 tonnes of lime produced, we will remove up to 7.86 tonnes of CO₂ from the atmosphere.


Gigatonne removal potential

Anything smaller
isn't going to cut it

prices today

We can’t wait for “at scale” removal prices

Harnessing nature's power

Because nature knows best

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