there are natural carbonated water springs that exist. there arent many but the fact that there are some pushes the average amount of carbonation in the earths water above the 0L mark.
which by definition means that the earth cannot be considered flat in either sense of the word
maths....
Ok but a soda or carbonated water that has lost most of its target fizzyness quotient (scientific term) is still regarded as being flat even if it has some carbonation left. If it were a sliding scale instead of "a" vs "b", then we could imagine a "locally flat" taste profile while admitting that the whole is not entirely flat. Which is a perfect description of Earth's geometry.
This would have never happened either way, CO2 only constitutes 0.04% of earth's atmosphere. A can of soda averages only 0.62% CO2 per 355ml can.
That is what Spock would have said.
