If you ever thought most oxygen on the Earth is produced by the rainforests, you might be wrong.
Marine Plants like Phytoplankton, Kelp and Alga`s are responsible for ( + / -) 70% of the oxygen in the atmosphere. Some Scientists even believe up to 85 percent.
Only 28% is produced by rainforests, the remaining 2% comes from other sources.
The Sea Plants produce oxygen as a byproduct of photosynthesis, a process which converts carbon dioxide and sunlight into sugars the organism can use for energy. So about 330 billion tons of oxygen comes out of the World Ocean.
Please remind that approximately 71% of Earth`s surface is covered by the Pacific, Indian, Atlantic, Arctic and Antarctic Ocean.
Humans can protect Algae`s and help overall ocean health by decreasing pollution, over harvesting, and habitat destruction.