lol - I’ve also wondered how many tons of CO2 are released each day by smokers...surely it should be banned immediately!
Just remember that every atom of carbon released to the atmosphere by smokers originally came out of the atmosphere through photosynthesis in the tobacco plant. The carbon is just being recycled.
While on the same point, remember that the net production of oxygen by a tree, from seed to full growth, death, and decay, is exactly ZERO. Every molecule of oxygen released to the atmosphere through photosynthesis is matched by a molecule of oxygen used to oxidize the plant material after the plant dies, whether the plant is eaten, burned, or decays.