Okay, another question. Sorry.
The below graph only shows CO2 concentration. Not cause and effect.
Suppose the cause is not increased production of CO2 but whatever mechanism or process that consumes it.
You are right, it only shows a correlation. But even if there is an intermediate mechanism, ie rising temps cause X-factor to occur which causes a rise in CO2 levels, even though indirect the rising temps would be causal to the rising CO2. The fact that it always seems to happen leads one to a causal connection even though it doesn’t reveal a mechanism to explain it.