Jason Lane schreef
Can anyone tell me what plants produce the most oxygen, especially
plants that are relatively small but output a lot of oxygen? I know
about phytoplankton, but I need something on land. Thanks much.

+ + +
I have a vague recollection of Sphagnum being mentioned. These have the
advantage that plants don't decompose (when left alone) so that the oxygen
is not reabsorbed
PvR