Following the 2022 eruption of Hunga Tonga-Hunga Ha’apai in the South Pacific, researchers have discovered a surprising atmospheric reaction that effectively reduces methane levels. The eruption released significant amounts of formaldehyde, a byproduct of methane breakdown, indicating that volcanic ash mixed with seawater and sunlight created reactive chlorine particles that helped eliminate methane. This finding could lead to a revision of the global methane budget, as atmospheric dust has not previously been accounted for in methane estimates. Methane, which is responsible for about one-third of global warming, has a much shorter atmospheric lifetime compared to carbon dioxide, making its reduction critical for immediate climate benefits. The research team, including scientists from the University of Copenhagen and other institutions, utilized satellite observations to track the methane breakdown, suggesting that similar natural processes could inspire future technologies aimed at reducing methane pollution. The study was published in *Nature Communications* and emphasizes the importance of addressing methane emissions alongside carbon dioxide for effective climate action.