Given that plankton accounts for the majority of the Earths O2 production and it can literally be seen from space... I'm sure it's a combo of both but I'd wager mostly plankton.
Given that plankton accounts for the majority of the Earths O2 production and it can literally be seen from space... I'm sure it's a combo of both but I'd wager mostly plankton.
RE: DIY - Designing Optimum Wavelength LED Lighting to Turbo-Boost Plant Growth (or Inhibit It)