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by asaegyn 2425 days ago
As the other comment points out, some of the major GHG's CO2 and CH4 are comprised of carbon. It is often used as a catch-all.

For example, the news earlier this year about treeplanting, spoke about removing Carbon from the atmosphere. Typically, the GHG's will be rolled up into either CO2e (CO2-equivalent) or just C. In the latter case, you often just have to do some molar math to get the CO2e from C.