50% of the oxygen we breathe comes from marine plankton. A part of plankton, phytoplankton or microalgae, acts like the green plants: Thanks to the photosynthesis, it absorbs carbon dioxide and produces over 50% of the oxygen we breathe.

The ocean redistributes heat on earth, which is stored in the ocean. Between 85 and 90% of the heat generated by human activities is stored in the ocean, far more than that stored in the earth and the atmosphere.