Without going back to research it I cannot remember the exact numbers. But the gist of it is human activity is contributing an extremely small percentage of the carbon dioxide that is generated every year naturally.
That percentage is statistically insignificant. Were we to destroy much of the human race and cut that statistically insignificant percentage in half, it would have no effect whatsoever.
In other words if the tiny amount of carbon dioxide that we contribute is enough to tip the scales, then we may as well bend over and kiss our asses goodbye. Because we would essentially have to wipe out the human race and that itself would not change the CO2 in the atmosphere significantly.
Instead of going to the extreme of which you mentioned, why not just Kiss Al Gore, John Kerry & various & assorted other climate change kooks goodbye ?