Frontier ↔ Alt Carbon

Frontier: a firm purchase of 1,851 t of enhanced rock weathering (agricultural) removal from Alt Carbon.

BuyerFrontier

SupplierAlt Carbon

Tonnes1,851 t

Amount$500,000

Capture pathwayEnhanced rock weathering (agricultural)

Storage mediumocean-dissolved

Commitment typefirm

Deal structureofftake

Source pathway descriptionEnhanced Rock Weathering process. Crushed basalt rock is spread on Darjeeling's heritage tea estates. The hot, wet & humid climate speeds up the rock's natural reaction with rainwater, pulling CO2 from the air & storing it in soil.

Storage descriptionCO2 stored in soil

Project locationDarjeeling, India

VerificationAlt Carbon's in-house MRV, team of scientists from the Indian Institute of Science, Bangalore, and the Darjeeling-Climate Action Lab (D-CAL)

NotesFrontier is an AMC founded by Stripe, Alphabet, Meta, Shopify, and McKinsey Sustainability. The participating buyers for this 4th cohort purchase are Stripe, Shopify, Google and Watershed (on behalf of Match). This is the first Indian company to receive a prepurchase agreement from Frontier. Project is called the Darjeeling Revival Project, targeting 500,000 hectares by 2030 with goal of removing

Durability defaultedtrue

Tonnes notetonnes trued to the Frontier portfolio page, 2026-09-01

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: Alt Carbon · Enhanced rock weathering (agricultural)