GLOBAL CO2. “It’s possible that both uplift and glaciers played a role in clearing out kilometers of crust. In 2013, researchers found that rocks of the Snowball Earth era had captured and stored carbon dioxide from the atmosphere, perhaps because extreme weathering had made the rocks particularly porous. This capture of carbon dioxide could have triggered global cooling, the flip side of the global warming occurring in modern times due to the burning of fossil fuels. The cooling could have led to a global icy climate, and the resulting glaciers could have then sped up erosion even more.”
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