2 ms·

No plankton means no oxygen planet-wise (forests provide zero or negative oxygen yield) as far as I know.

• iwwr 16y ago
  "forests provide zero or negative oxygen yield" Do you know of a resource you can point to about that topic?
  • d0mine 16y ago
    No, a quick google search shows that most resources think that 20-70% of the world's atmospheric oxygen comes from trees.