I love trees, well most trees, not a fan of pine trees, as they seem to plant those everywhere .... So after the tree grows, and captures the carbon, then what

I love trees, well most trees, not a fan of pine trees, as they seem to plant those everywhere .... So after the tree grows, and captures the carbon, then what? Do you let it die, rot and release its carbon? If carbon is the problem, because the earths total carbon is pretty much constant, then is not the problem how to get rid of carbon, or at least keep it in a captive state? All the carbon, was captured in the ground as oil. Why not put carbon back in the empty oil wells? As in yard waste?