UNDO CARBON

XPRIZE TRACK
ROCKS

CDR PATHWAY(S)
Rocks - Ex-situ mineralization of mined rocks

PHYSICAL PRODUCTS
None

FOUNDED
2022

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UNDO Carbon Ltd.
London, United Kingdom
www.un-do.com

Nick Acfield
[email protected]

COMPANY DESCRIPTION

With nature-enabled enhanced rock weathering technology, UNDO generates permanent, high-quality carbon removal credits with added co-benefits to support businesses on their pathway to net zero. UNDO aims to remove one million tonnes of CO₂ annually by 2030, a first step towards gigatonne-scale operations.

CORE INNOVATION

UNDO built its own tech platform, has world-leading scientific R&D and has written the partnership playbook to harness global networks on scaling carbon removal globally. The global ERW company has spread more crushed silicate rock than any other ERW developer and uses its operational, scientific and commercial knowledge to drive down the cost of high-quality carbon removal. Critically, UNDO’s MRV encompasses a multi-proxy approach across solid, aqueous and gaseous measurements combined with a best-in-class geochemical model.

CO2 CAPTURE

For millions of years, CO₂ has combined with rainwater to form carbonic acid. When this dilute acid falls, the CO₂ interacts with rocks and soil, mineralises and is safely stored as solid carbon for hundreds of thousands of years. UNDO does enhanced rock weathering, accelerating this natural weathering process by spreading crushed silicate rock such as wollastonite on agricultural land, vastly increasing the surface area of the rock and therefore its contact with CO₂.

CO2 SEQUESTRATION

When carbonic acid rainwater falls and contacts the crushed silicate rock, weathering occurs. This releases solutes, including bicarbonate ions (HCO3-) which chemically mineralise atmospheric CO₂ into a stable solid. These bicarbonates drain into surface waters or are transported via rivers to the oceans, where they are locked away for tens of thousands of years.

CO-BENEFITS OR PRODUCTS

ERW releases calcium, magnesium, silicon, and other macro and micronutrients into the soil, acting as a beneficial input. This results in greater crop yields, increased pest resistance, improvement to the pH of soils and a reduced need for CO₂-emitting lime inputs. UNDO provides its product to farmers for free or heavily subsidised, meaning they are saving money on inputs and reaping more during harvest time. On a UK crop trial in partnership with Newcastle University, an average 15% yield increase on spring oats was observed.