"Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting pla

"Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize" https://oceanservice.noaa.gov/facts/ocean-oxygen.html https://oceanservice.noaa.gov/facts/ocean-oxygen.html