We can guess by looking at the SO₂ deposited by volcanic eruptions > [The 1991 eruption of Mount Pinatubo released] 17 megatons of sulfur dioxide into the atmo

We can guess by looking at the SO₂ deposited by volcanic eruptions > [The 1991 eruption of Mount Pinatubo released] 17 megatons of sulfur dioxide into the atmosphere, causing global cooling by 0.5 °C (0.9 °F) between 1991–1993 > [It] oxidized in the atmosphere to produce a haze of sulfuric acid droplets, which gradually spread throughout the stratosphere over the year following the eruption https://en.wikipedia.org/wiki/1991_eruption_of_Mount_Pinatubo#Effects_on_agriculture https://en.wikipedia.org/wiki/1991_eruption_of_Mount_Pinatub...