The Ocean — Oxygene -

: 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

: Single-celled algae that also contribute significantly to the oxygen cycle. Does the ocean produce oxygen? : Like land plants, phytoplankton use sunlight, carbon