Water gives us oxygen 💧 About 50–80% of the oxygen on Earth actually comes from the ocean, not from trees. 🌎 Here’s how it works: 🌊 Tiny ocean plants called phytoplankton, along with algae and cyanobacteria, use photosynthesis, they take in carbon dioxide and release oxygen, just like land plants do. 🌱 Because these microorganisms are so abundant and cover such a huge area of the ocean, they produce most of the oxygen in our atmosphere. So, when you breathe in, there’s a good chance every ot