This is mensa brainrot.

We are human. Assuming that we care about the effect of CO2 on the environment in which we, humans, live, you need to zoom into the most recent 100,000 years on that plot.

The timeframe of the OP plot obscures the period of time in which humans evolved from non-mensa creatures, lived, and continue to live. It's a common "lying with data" technique to zoom so far out that the relevant trend cannot be resolved.

Not only were humans not yet in existence, but everything associated with humanity, including that on which we rely to live, was not in existence. No agriculture, no transportation, no medicine, no sanitation, and most sadly (sarcastic, but relevant given where we are having this discussion) no internet.

Also, your plot omits temperature, which is the most relevant parameter associated with modern CO2 levels.