Oxygene - The Ocean -

: Like land plants, phytoplankton use sunlight, carbon dioxide ( CO2cap C cap O sub 2

: One of the most abundant photosynthetic organisms on Earth; it is estimated that one out of every five breaths we take originates from this single genus of bacteria. Oxygene - The Ocean

The primary source of ocean oxygen is microscopic organisms known as . These tiny, plant-like drifters live in the "photic zone"—the top 200 meters of the ocean where sunlight can reach. : Like land plants, phytoplankton use sunlight, carbon