1. Fill in the blanks.
(e) The major reservoir of carbon on earth is_________.
The major reservoir of carbon on Earth is the ocean.
Any carbon reservoir's size is expressed in mass units. It is estimated that there are 65,500 giga-tonnes of carbon in the entire earth. The deep oceans are the world's greatest (major) carbon storehouse. The ocean has over 37,000 GtC of carbon, whereas the atmosphere and biosphere have roughly 750 and 610 GtC of carbon, respectively.