[Virginia-American]

If plants were converting oxygen from water at such a rate, the seas would be dropping constantly and would have almost dissappeared by now.

Huh, I don't follow at all.

[gore3000]

"Huh, I don't follow at all."

If plants create oxygen from water as Vade implied was the reason for no oxygen in the atmostphere before plants arose, then water levels would be constantly decreasing. This is not the case.