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.
No, but when we say "carbon emitter", we're talking about methane and other alkanes... and CO2.
CH4 is itself a greenhouse gas that is more potent than CO2 in the short term... and then it decays to water vapor and CO2 in reactions with radicals in the upper atmosphere.
So, it's overall somewhat worse than CO2 in the short term (since it's not just CO2), and equivalent in the long term?
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.