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Not to put too fine a point on it, but there are at least two anthropogenically produced gases that absorb infrared and therefore contribute to the "greenhouse" effect part of the global warming mechanism -- carbon dioxide and methane (think land fills, cow farts, and rice paddie.) Carbon dioxide is CO2. Methane is CH4. I know journalists and others have picked up on using "carbon" in lieu of CO2 because they misunderstood what the actual experts were saying, but that doesn't mean the experts were talking about elemental carbon in all its particulate blackness. Experts also talk about "phosphorous" and "nitrogen" in fertilizer without meaning the elemental form of either. So relax.
