All living things are made up of Carbon, Oxygen, Hydrogen and nitrogen with other elements join in in smaller quantities. If you grow from 8 pounds to 200 pounds, you take up a lot of CO2 as do plants and especially trees.
It takes time for chemical reactions to move away from or towards equilibrium. It is far from instantaneous where carbon dioxide is concerned. Small sea creatures (like coral) take up carbon dioxide from the sea and the atmosphere and combine it with calcium to make limestone and coral reefs. It takes a long time, but it is
inexorable. This is why the AGW argument is so naive. It is not looking at the correct timing for the processes.
You really need to look at the way life works on the planet. It is called the carbon cycle.
I understand the carbon cycle perfectly well. You are way oversimplifying the matter. We are releasing CO2 into the atmosphere that was accumulated over millions of years, and has been contained for millions.
That goes way beyond the circle of life/carbon cycle process. That is why the amount of CO2 in the atmosphere is increasing. Sure, over time things might reach an equilibrium. I never said that it wouldn’t.
I just don’t see how any of this has to do with the fact that too much CO2 in the atmosphere is harmful. There isn’t really any disagreement on that fact. The disagreement is about how much CO2 in the atmosphere will be harmful, what is the effect of too much, what could cause it, and whether it is something we need to do something about.