Pretty sure we've considered sulfur dioxide or similar, which has in the past been released from large scale volcanic eruptions that have cooled the earth. One

Pretty sure we've considered sulfur dioxide or similar, which has in the past been released from large scale volcanic eruptions that have cooled the earth. One such event was the eruption of Mount Tambora in 1815, which caused global crop failure due to low temperatures. Freezing temps persisted into June in Europe and North America. https://en.wikipedia.org/wiki/1815_eruption_of_Mount_Tambora https://en.wikipedia.org/wiki/1815_eruption_of_Mount_Tambora Related: https://earthscience.stackexchange.com/questions/9805/would-adding-sulfur-dioxide-to-the-atmosphere-have-a-global-cooling-effect/9809 https://earthscience.stackexchange.com/questions/9805/would-...