It may surprise you to know that around three quarters of the Earth's surface is covered by the marine biome, consisting of oceans, coral reefs and estuaries.
Even more surprising is the fact that 85% of all plant life is found in oceans. In 2011 NASA found that the waters of the Arctic Ocean, despite being covered by three-foot thick ice, are richer in microscopic marine plants than any other ocean region in the world.
Scientists agree that there's oxygen from ocean plants in every breath we take. Most of this oxygen comes from tiny the ocean plants called phytoplankton. They live near the water's surface and drift with the currents. Scientists believe that phytoplankton contribute between 50 to 85 percent of the oxygen in Earth's atmosphere.