“ What… did all natural sources of CO2 suddenly stop? Maybe trees are holding their collective breath?”
Surely, you are engaging in a parody of denialist “thought” here. Bravo.
If I were to respond to you as if you were saying something serious, I would state the common-sense reply that what you describe is part of the natural CO2 cycle outside of human cause, the human cause being foraging for carbon-based energy sources — something the planet doesn’t do naturally.