Frontier buyers commit $31.3 million for Planetary's ocean alkalinity enhancement

Frontier has facilitated a $31.3 million offtake agreement with Planetary for the removal of 115,211 tonnes of CO₂ between 2026 and 2030 through ocean alkalinity enhancement (OAE). Planetary's OAE process involves adding dissolved alkaline minerals to coastal seawater, converting dissolved CO₂ into stable bicarbonate ions. This deal expands on a pilot project that delivered the first verified OAE tonnes and initiates the next operational phase. The approach aims to achieve gigaton-scale removal at a cost of $50-160 per tonne, while also mitigating ocean acidification.