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Continue to ChatHigh CO2 and Global Greening 23 million years ago https://www.skeptical-science.com/science/high-co2-and-global-greening-23-million-years-ago/
High CO2 and Global Greening 23 million years ago https://www.skeptical-science.com/science/high-co2-and-global-greening-23-million-years-ago/