In addition, CO2 dissolved in water is converted to calcium carbonate and used in shells and skeletons of marine animals. Here phyto-planktons are the equivalents of plants, on whom all life in the oceans depends. Oceans uptake - Atmospheric CO2 is taken in and used for photosynthesis also in oceans.Photosynthesis - Green plants use CO2, along with water and energy from the sun in a process called photosynthesis to form simple sugars and then the nutrients plants need.Formation of organic matter and carbon sinks are slower and require time. CO2 is removed from the air and is fixed by quick daily processes. The amounts of carbon that are moved every year are shown as PgC per year in the diagram. There is a constant addition and uptake from this carbon pool. Without this life as it exists would not be possible on earth.
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