Tonga's Enormous Volcanic Eruption Cleaned Up Part of Its Own Methane Emissions in 2022, Hinting at a Way to Fight Climate Change

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When Tonga's Hunga Tonga-Hunga Ha'apai volcano erupted catastrophically in January 2022, its massive plume didn't just add another climate insult, it accidentally cleaned up some of its own mess. Researchers analyzing satellite imagery discovered that the eruption's sulfur dioxide broke down methane in the surrounding atmosphere, a potent greenhouse gas roughly 80 times more warming than carbon dioxide over 20 years. The finding offers a provocative clue: if volcanic chemistry can destroy methane at scale, perhaps engineered interventions could replicate the effect. Scientists caution this isn't a silver bullet, but the mechanism could inform future climate mitigation strategies.