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Geochemistry

Warm debate on early climate

Would Earth's early ocean have been a frozen wasteland had levels of atmospheric methane not been sky high? Maybe. Or maybe, according to a new view of an old idea, the main warming agent was carbon dioxide.

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Figure 1: The answers lie in the soil? Right, the Pilbara region of northwestern Australia, which is famous for its old rocks and their geochemical signatures of conditions on the surface of the early Earth.

T. W. LYONS

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Lyons, T. Warm debate on early climate. Nature 429, 359–360 (2004). https://doi.org/10.1038/429359a

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