Fair question. Here are all the greenhouse gases with historical concentrations and projected out until 2500. https://gmd.copernicus.org/articles/13/3571/2020/
Intergovernmental Panel on Climate Change AR6 WG1 Draft Introduction
I just discovered a draft of the IPCC AR6 WG1 introduction that hasn’t been previously seen. For the first time, here it is for all to see.