FWIW, often statistics talking about CO2 are actually talking about CO2 equivalent, which is a way of normalising the harm levels of different pollutants. Typically this is used to compare things like farming and fossil fuels, which produce very different gases.

Unfortunately, I can't tell if the source linked actually uses this metric but isn't being clear, or if it's just focused on CO2, and I'm struggling to find another source that does use CO2 equivalent emissions as a metric.