Frontier Is Betting $31 Million On Ocean Alkalinity For Carbon Removal

Aug 27, 2025

When we talk about carbon removal, the conversation often feels like science fiction. Machines that suck CO₂ directly from the air, forests genetically engineered to grow faster, mineral powders spread on farmland to lock away greenhouse gases. Each approach is tantalizing, none assured.

Now, the ocean is stepping forward as a solution.

Frontier, the $1 billion carbon removal fund backed by Stripe, Google, Shopify, McKinsey, and others just announced a $31.3 million offtake agreement with Planetary, a Canadian climate-tech firm pioneering ocean alkalinity enhancement (OAE). Under the deal, Planetary will remove 115,211 tons of CO₂ between 2026 and 2030 at $270 a ton.

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