Oceans are the reservoir that has the largest deposit of carbon.
Why oceans are considered largest deposit of carbon?
The oceans are the largest reservoir of carbon which is followed by geological reserves of fossil fuels, the terrestrial surface (plans and soil), and the atmosphere. Carbon moves naturally between the earth and atmosphere continuously. Ocean is called a carbon 'sink' because it absorb more carbon from the atmosphere than it gives up through photosynthesis.
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