In other words just decreasing CO2 emissions won't do anything to change the current course, we'd actually have to go negative so much we get it down well below 400 ppm. Trillions of lbs of CO2 per year turned into limestone or whatever for decades to have any impact.
Can CO2 trap infinite heat?
No but that's not necessarily a good thing.
This paper claims that CO2 is saturated at 400 ppm in terms of heat retention which would mean the initial increase from industrial times is responsible for the warming by increasing from ~300 to heat saturation level and everything we're doing now is just locking it in.
In other words just decreasing CO2 emissions won't do anything to change the current course, we'd actually have to go negative so much we get it down well below 400 ppm. Trillions of lbs of CO2 per year turned into limestone or whatever for decades to have any impact.