The effect of greenhouse gases on climate is underscored by modelling work showing that formation of the Antarctic ice sheet, 34 million years ago, occurred largely because of a fall in atmospheric CO2 concentration.
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Barrett, P. Cooling a continent. Nature 421, 221–223 (2003). https://doi.org/10.1038/421221a
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DOI: https://doi.org/10.1038/421221a
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