Since CO2 is soluble in water and the oceans cover a majority of the Earth's surface, the oceans sequester more CO2 than any other CO2 sink.
Because of the inverse solubility of CO2 with temperature, the colder the oceans get, the more CO2 they can absorb.
Conversely, when the oceans get warmer, they expel CO2.
Atmospheric CO2 therefore follows global temperatures, it does not cause them.
You can see the yearly global atmospheric CO2 fluctuation as the oceans warm and cool with the seasons in the NOAA graph below.
The "settled science" that CO2 causes "climate change" is therefore criminal sophistry.