Frontier buyers commit $25.4 million to CarbonRun for river liming carbon removal

Frontier buyers have signed the first river liming carbon removal deal, committing $25.4 million to CarbonRun for the permanent removal of 55,442 tonnes of CO₂ between 2025 and 2029. The Canadian company will deploy the method, which involves adding crushed limestone to acidified rivers, starting in Nova Scotia. This approach not only removes CO₂ by converting it to bicarbonate but also offers co-benefits like ecosystem restoration. Stripe is providing an additional $1 million R&D grant to CarbonRun to explore the method's potential in neutral pH rivers. The deal aims to gather data on limestone dissolution and safe application rates.