Why global methane levels spiked during COVID lockdowns |
Six years ago, as countries around the world went into COVID lockdowns, the air got cleaner. Factories slowed down, roads emptied and aeroplanes were grounded. As people stayed home, the world burned fewer fossil fuels and so carbon dioxide emissions dropped – by around 7% in 2020.
But something else was also happening in the atmosphere. Levels of methane – an extremely potent greenhouse gas that warms the planet even faster than CO₂ – rose faster in 2020 than at any point since records began in the 1980s. And methane levels kept on rising during 2021 and 2022.
Ever since, scientists have been trying to piece together what caused this sudden mysterious increase in methane. Now,........