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Continue to ChatThe interval also marks the last time the Earths atmospheric CO2 [carbon dioxide levels] was as high as today, providing important clues about what the future holds in the face of current anthropogenic warming. - Geosciences Professor Bogdan Onac from https://whatsmyquote.com/quote/the-interval-also-marks-the-last-time-the-earths-atmospheric-co2-carbon-dioxide-levels-was-as-high-as-today