Is it possible that humans' breathing out of carbon dioxide makes up a large portion of greenhouse gas?

Question

And that the worldwide increase in greenhouse gas emmisions is due in large part to the world population increase?

Answer 1

Uh, no.

Vegetation takes up most of out cardon dioxide.  To my knowledge, no one has made a serious claim that our own body is the/a cause for global warming.

Answer 2

To begin with the total percentage of CO2 in Earth’s atmosphere is very small compared to water vapor.

CO2 makes up less than 1 percent, of all the greenhouse gasses. So even if the human population increases it makes little or no difference in the percentage of CO2.

Answer 3

About as stupid as people claiming cow farts put out too much CO2.

How many forest fires burned before man was on Earth?  Before fire rescue was invented.

How many billion square miles of forest burn every year from natural events?

Now, compared to that, do you think even 100 billion people can compete?  Not likely.