Microsoft ↔ UNDO

Microsoft: a firm purchase of 5,000 t of enhanced rock weathering (agricultural) removal from UNDO.

BuyerMicrosoft

SupplierUNDO

Tonnes5,000 t

Capture pathwayEnhanced rock weathering (agricultural)

Storage mediumocean-dissolved

Commitment typefirm

Deal structureofftake

Source pathway descriptionenhanced weathering — spreading 25,000 tonnes of basalt rock on farmland

Delivery windowtwo decades

NotesUNDO is a Scottish enhanced weathering company. The purchase involves spreading 25,000 tonnes of basalt rock to sequester 5,000 tonnes of CO2 over the next two decades.

Durability defaultedtrue

Previous durabilitydurable-1000y

Previous durability basispathway-default

Durability notePathway default removed; duration requires source evidence

automatically extracted from the cited source; not yet reviewed by a person · discovered via carbon-removal-updates · extracted 2026-08-24

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More: UNDO · Enhanced rock weathering (agricultural)