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deal · 12 June 2026
Microsoft ↔ Alt Carbon
Microsoft: a stated intent to buy of 36,920 t of enhanced rock weathering (agricultural) removal from Alt Carbon.
BuyerMicrosoft
SupplierAlt Carbon
Tonnes36,920 t
Capture pathwayEnhanced rock weathering (agricultural)
Storage mediumunknown
Commitment typeintent (a memorandum or letter, not a contract)
JurisdictionIndia
Deal structureofftake
Transaction evidenceMicrosoft has signed a carbon removal agreement with enhanced rock weathering firm Alt Carbon to support the removal of almost 37,000 tons of CO2 in Darjeeling, India.
Source pathway descriptionenhanced rock weathering firm Alt Carbon; The DRP is Alt Carbon’s flagship initiative, in which the company applies ERW at tea estates in the region.
Project locationDarjeeling, India
NotesCredits come from Alt Carbon's Darjeeling Revival Project (DRP). Microsoft retains an option to buy additional volumes, subject to successful delivery and verification milestones. No additional volume is stated. The article describes ERW storage as solid carbonate only in a general explanation of the pathway, not as a transaction-specific storage statement. The article also mentions Alt Carbon's o
Date noteDate corrected to the date the announcement states. Deal Book cleanup 0200
Prior announced date2026-11-02
Jurisdiction basiscountry named in the source project location
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