Oceans already absorb about 2.4 billion tonnes of CO2 annually, but new methods could boost that by 8 billion tonnes per year by 2050. The article from Reuters covers engineered solutions like Captura's electrochemical seawater processing and nature-based approaches such as mangrove restoration. Both face scaling challenges around cost, verification, and permanence. Policy support is mixed. US federal research on marine carbon dioxide removal (mCDR) took hits under Trump, but a new bipartisan bill aims to restore funding. Europe and Japan are developing frameworks. Advanced market commitments from groups like Symbiosis are starting to fund mangrove projects, though questions remain about how to accurately measure and verify ocean carbon storage over time.
