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Volcano's giant cloud unexpectedly destroys methane pollution

So here's what amazed scientists - when Hunga Tonga erupted beneath the South Pacific in January 2022, its enormous volcanic plume didn't just cause destruction, it actually helped clean up methane pollution in the atmosphere. Researchers detected unusually high levels of formaldehyde in the cloud, which acts as a chemical fingerprint showing that methane was being destroyed continuously for over a week - removing about 900 megagrams per day, equivalent to emissions from two million cows. The mechanism involves volcanic ash mixing with seawater and sunlight, creating iron salt aerosols that release reactive chlorine atoms capable of breaking apart methane molecules. This discovery could have major implications for climate science, potentially helping researchers develop new strategies to reduce methane faster and slow near-term warming in ways nature itself is already demonstrating.
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