This is the first time in human history our planet’s atmosphere has had more than 415ppm CO2.
Not just in recorded history, not just since the invention of agriculture 10,000 years ago. Since before modern humans existed millions of years ago.
We don’t know a planet like this.
415.26 parts per million (ppm) CO2 in air 11-May-2019 http://scripps.ucsd.edu/programs/keelingcurve/ … First daily baseline over 415ppm