View original ↗on altcarbon.com
deal · 27 May 2026
Frontier ↔ Alt Carbon
Frontier: a firm purchase of 9,566 t of enhanced rock weathering (agricultural) removal from Alt Carbon.
BuyerFrontier
SupplierAlt Carbon
Tonnes9,566 t
Capture pathwayEnhanced rock weathering (agricultural)
Storage mediumsoil
Commitment typefirm
Deal structureofftake
Source pathway descriptionEnhanced Rock Weathering (ERW) — spreading waste basalt across agricultural land, where it reacts with CO₂ dissolved in rainwater to form stable bicarbonate ions carried through river systems to the ocean and stored as calcium carbonate for over 10,000 years
Storage descriptionStable bicarbonate ions stored as calcium carbonate in the ocean for over 10,000 years
Project locationDarjeeling and Terai regions, India
VerificationIsometric Registry (independent Validation and Verification Body)
NotesCredits delivered to Frontier coalition (Stripe, Google, Shopify, Match Group) through Watershed. Additional buyers include CEEZER, NextGen CDR (South Pole and Mitsubishi-led coalition), and undisclosed buyers spanning technology, finance, shipping, commodity trading, aviation, and AI hyperscalers. This represents Alt Carbon's third consecutive delivery and cumulative largest ERW issuance globally
Durability defaultedtrue
Previous durabilitydurable-1000y
Previous durability basispathway-default
Durability notePathway default removed; duration requires source evidence
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