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Now show us the same graph, but going back to first hominidae.
Where the current day curve, you may ask. At this scale, it’s that line on the right going straight up.
Now the carbon dioxide concentration has naturally oscillated between 200 and 280 ppm in hominidae history. This is because of ice ages. Massive layers of ice covering large areas of the planet. So the change in atmospheric carbon due to human activity is more than 1½ times the change from an ice age.