How much carbon dioxide does a human exhale in a year?

Answer 1

Roughly 2 Pounds per day so roughly 730 pounds per year.
In case you use other measurements its 1 Kilogram/day which equals 2.2 pounds.


On average.

The exact amount depends on age, sex, size, and most importantly activity level

Answer 2

The question should be is how much CO2 that man produces ,that is not recycled by the plants and photosynthesis. The point none of the CO2 represents anything unless the CO2 doesn't get recycled .