Ocean Oxygen

Ocean Oxygen Crisis Deepens as Carbon Dioxide Removal Efforts Face New Challenges

Ocean oxygen has dropped ~2%, pushing marine life to the brink while climate-fix tech risks worsening the situation. Some CO₂ removal methods deplete deep-sea oxygen up to 40× more than their climate benefits. Safer alternatives—alkalinity enhancement, harvested seaweed, and coastal restoration—can store carbon while preserving oxygen. Scientists urge mandatory oxygen monitoring, community engagement, and protective policies that ensure climate solutions don’t drain the seas they aim to save.