Discussion
This is one of my favourite charts. This is the one the genius' amongst us like to hold up when they reckon we've had "way higher co2 in the past". What they don't realise they're holding up is a chart that says co2 levels have only changed in the past over millions and millions of years, like unfathomably slowly. Our co2 levels are changing so fast that on this chart the line does not go to the right, it goes straight up, perfectly straight and straighter than we've ever seen it go before. The only times it's been close have been fun events like meteor becoming crashed into us and super volcano tantrums. For anyone that doesn't think the rate of change matters, I invite to try going from 100kph to 1kph in 0.01 seconds.
Historic co2 levels show that the earth and life on earth are completely fine with > an order of magnitude higher co2 ppm. It also shows that co2 levels are variable and have been drastically different despite zero human intervention.