During the last 800 000,climate reconstructions show that CO2 never changed more than how many ppm upward or downward in any span of less than 1000 years,though it has risen by this amount in the last 13 years?

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During the last 800,000 years, CO2 levels have never changed more than 30 ppm in any span of less than 1000 years, but in recent times, specifically the last 13 years, CO2 levels have risen by this amount, indicating a rapid increase in atmospheric CO2 due to human activities.

During the Last 800 000,climate Reconstructions Show That CO2 Never