Dark Oxygen

The discovery of “dark oxygen”, oxygen produced deep under the surface of the sea, is shining a light on the potential risks of deep-sea mining for metals and minerals. There has already been great controversy over plans to approve deep-sea mining activities at the international level, to meet the growing demand for critical minerals, and the recent discovery demonstrates just how little we know about marine ecosystems. An international team of researchers recently discovered that oxygen is being made by potato-shaped metallic nodules deep under the surface of the Pacific Ocean. In July, their findings, which throw into dispute the concepts of oxygen production, were published in the Nature Geoscience journal.