Rate of change is the big thing, not necessarily absolute level.
The closest analog for what’s going on now and will probably continue to go on for ~100,000 years is the Paleocene-Eocene thermal maximum (PETM) https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum . Though we may be altering the atmosphere up to two orders of magnitude faster than that one did.
Rate of change is the big thing, not necessarily absolute level.
The closest analog for what’s going on now and will probably continue to go on for ~100,000 years is the Paleocene-Eocene thermal maximum (PETM) https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum . Though we may be altering the atmosphere up to two orders of magnitude faster than that one did.