The slashing of pollution from shipping in 2020 led to a big “termination shock” that is estimated have pushed the rate of global heating to double the long-term average, according to research.
Until 2020, global shipping used dirty, high-sulphur fuels that produced air pollution. The pollution particles blocked sunlight and helped form more clouds, thereby curbing global heating. But new regulations at the start of 2020 slashed the sulphur content of fuels by more than 80%.