[eloff]

The article talks about this being the highest point in the last 800K years, but you're right that geologically speaking the levels are quite low for our planet.

The problem is life takes a long time to adapt, including us silly humans who build our cities on the coast. Just because CO2 levels have been higher before does mean the process will be a pleasant one.

It may well involve the extinction of large numbers of species, and large numbers of humans (never all humans as some people seem to be fond of saying.) It could even possibly trigger collapse of civilization in extreme enough scenarios where methane from the oceans and tundras is released in a feedback loop.

So yeah, you're factually correct, but missing the point.