Marine CDR

🌊 Vox Makes the Case for Marine CDR Vox published a major feature on ocean-based carbon removal, arguing it can address excess atmospheric CO₂ and ocean acidification simultaneously. Equatic plans to commission the world’s largest marine CDR plant in Singapore later this year, removing ~10 tCO₂/day via seawater electrolysis. The piece positions mCDR as a potentially superior pathway that doesn’t compete for agricultural land — but notes the field is “quite new” and MRV challenges remain. ...

The first ship-based ocean alkalinity enhancement (OAE) experiment just delivered results. Woods Hole Oceanographic Institution poured 65,000 litres of sodium hydroxide into the Gulf of Maine in August 2025, and the findings are cautiously encouraging: 2–10 tonnes of CO₂ removed in four days, with up to 50 tonnes estimated total. No significant impact on marine life detected. Adam Subhas and his team presented these findings at the Ocean Sciences Meeting 2026 in Glasgow. “We can definitely say that there was additional CO₂ uptake as a result of this experiment,” Subhas said. ...