Supervolcanic Explosions 75,000 Years Ago Cause Significant Drop in Ozone Levels

When the volcanic ash and gases of the Toba Supervolcano exploded into the atmosphere, it partially blocked the sunlight and reduced the world's temperature down to 3.5 degrees, allowing disruption and famine in the ecosystem. A study suggests that the supereruption had not just caused attenuation of visible sunlight and cooling deceleration of the water cycle, but it also depleted the Earth's ozone layer.