A project is underway to investigate the production of “dark” oxygen further. ... predominantly found 4,000 meters (13,100 feet) below the surface in the Clarion-Clipperton Zone, ...

However, a study reports that these nodules might be much more than simply a collection of valuable materials for electric cars—they also produce oxygen 4,000 meters below the surface where ...

Scientists discovered "dark oxygen" produced by deep-sea ... A study analyzing these modules reveals that these rocky lumps are capable of producing “dark oxygen” 4,000 meters below sea level ...