The amount of carbon in the atmosphere is about of the total amount of carbon on earth.
a. 0.01%
b. 0.1%
c. 1%
d. 10%

a) 0.01 %

Explanation:

The carbon in the atmosphere is mainly in the form of carbon dioxide (CO2).

The ammount of carbon is arround 700 gigatons and they represent the 0.01 % of the carbon on Earth.

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