It depends.

One of the things that makes Earth special is the formation of carbonate rocks by life taking CO2 out of the atmosphere and falling to the bottom of the oceans; these rocks are then subducted by tectonics and the CO2 spewed out by volcanoes.

As the Earth's core cools, volcanism will diminish, and so the recycling of CO2.

But perhaps Nuclear fusion can fix everything... However I am not a geologist.