The carbon cycle is an interesting and complicated subject: https://en.wikipedia.org/wiki/Carbon_cycle https://en.wikipedia.org/wiki/Carbon_cycle TLDR is that

The carbon cycle is an interesting and complicated subject: https://en.wikipedia.org/wiki/Carbon_cycle https://en.wikipedia.org/wiki/Carbon_cycle TLDR is that a large part of the carbon we dump into the atmosphere is only removed by geological processes that take hundreds or thousands of years.