Think trees give us most of our oxygen? Think again. Up to 80 percent of Earth’s oxygen comes from the oceans thanks to microscopic organisms like phytoplankton. These tiny life forms float near the ocean’s surface and pump out oxygen through photosynthesis keeping our planet breathable. For more content like this, please visit: https://t.co/Zt74k0qDSK #OceanFacts# #OxygenMyth# #ClimateScience#