[Lewis Thomson (OP)]

Donald wants to know answers to this question

"The Earth's original atmosphere had CO2 and no significant O2. Biological processes eventually sequestered that CO2 into glucose and other organic molecules leading to the "oxygen catastrophe". How much carbon is trapped?  Coal was produced way after the oxygen catastrophe when atmospheric CO2 was a thousandth of the primal CO2 and there is so much coal! Where is all that original CO2?"

Leave your thoughts in the comments below...

[alancalverd]

Mostly in chalk and limestone deposits.

[Rocky6419]

Hi everyone, can you know that most of the carbon on Earth is stored in rocks and sediments. And the other carbon is trapped in the ocean or atmosphere.