Ancient carbon thought to be safely stored underground for millennia is unexpectedly resurfacing literally. Over half of the carbon gases released by rivers come from long-term, old carbon sources like deep soils and weathered rocks, not just recent organic matter.
https://www.bristol.ac.uk/cabot/news/2025/ancient-co2.html?utm_source=bluesky&utm_medium=social&utm_campaign=fedica-Autoposting