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Pandemic lockdowns reduced pollution, weakening nature’s methane cleanup and causing a sharp rise in atmospheric methane.
A 2020–2022 surge in atmospheric methane, doubling the annual increase, was largely driven by reduced nitrogen oxide emissions during pandemic lockdowns, which weakened the atmosphere’s natural methane-cleaning mechanism.
Lower hydroxyl radical levels, caused by less pollution, allowed methane to persist longer, accounting for about 80–83% of the spike.
Increased emissions from tropical wetlands due to wetter, warmer conditions also contributed.
Despite cleaner air, the unintended consequence highlights a climate paradox: pollution reductions can slow methane removal, worsening global warming.
Scientists stress that cutting human-caused methane emissions remains critical to offset these effects.
Los cierres causados por la pandemia redujeron la contaminación, debilitaron la limpieza de metano de la naturaleza y provocaron un fuerte aumento del metano atmosférico.