What were the environmental consequences of Toba’s eruption some 73,000 years ago?



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    The best theories regarding the super eruption at Lake Toba suggest that the environmental effects of were catastrophic. Most evident was the change in the global climate that resulted. Already in the midst of an Ice-Age, the eruption threw-up so much ash and debris that it actually lowered global temperatures by between 3 and 5 degrees Celsius. More locally, the ash and soot that feel to the ground covered hundreds of square miles with up to 9 meters of debris, chocking out all life. Additionally theories suggest that such an event may have crippled early human populations, slashing populations to a fraction of their previous numbers and creating a bottle-neck effect of human genes.

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