Can 'Super Volcanoes' Cool the Earth in a Major Way? A New Study Suggests No.
Briefly

The relatively modest temperature changes we found most compatible with the evidence could explain why no single super eruption has produced firm evidence of global-scale catastrophe for humans or ecosystems.
McGraw and colleagues analyzed microscopic sulfur particles' size injected into the atmosphere by eruptions to understand historical climate shifts.
Read at State of the Planet
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