- The massive Hunga Tonga–Hunga Haʻapai eruption lofted ash and huge amounts of salty water vapor into the stratosphere—and surprisingly appears to have helped destroy some of its own methane emissions.
- Satellites spotted a formaldehyde cloud lasting about 10 days, a chemical sign that methane was being continuously broken down in the plume.
- Researchers say the chemistry could inspire new ways to cut methane (a powerful short-term warming gas), but scientists warn geoengineering risks and say much more testing is needed.
The news, distilled into what matters.
Get the full experience in the app — topics, comments, and audio summaries.