Volcanoes

The eruption of a volcano in Iceland in 1783 led to significant climate impact, causing severe cold and speculations on the relationship between volcanic ash and atmospheric cooling. This event highlighted the potential of volcanic activity to drastically affect earth's climate.
 Benjamin Franklin (Hypothesis) United States 1783 Volcanoes

The eruption of a volcano in Iceland in 1783 led to significant climate impact, causing severe cold and speculations on the relationship between volcanic ash and atmospheric cooling. This event highlighted the potential of volcanic activity to drastically affect earth's climate.