[qw3rty01]

Exhaled CO2 is in equilibrium with plants inhaling CO2 to provide us food, so exhaling isn't considered a factor in global warming.

[scared2]

But you need large number of plants to make it in equilibrium. Currently rate if deforestation is in par with global population growth

[qw3rty01]

It has to be either in equilibrium, or in excess on the side of plants. If it's in excess on the side of humans, people would be dying out due to lack of food, which would then put it back into equilibrium. Deforestation isn't relevant to food because we don't eat trees.