@LadyDragonfly@universeodon.com is that 71% water on surface or total composition?
71% water surface carbonation doesn't account for total volume.
based on the assumption of 71% water composition, some % has naturally occuring carbonation. that would make < 71% of earth's overall composition flat. but, the remaining 29% is not water so doesn't count in context of water carbonation.
assuming only earth water, then 71% is 100%. from that, i wonder what % contains naturally occuring carbonation?