“Kewp, was it you who brought up quantum chromodynamics? For a simple person (me), will you explain how that impacts global warming?”
If you want to get beyond mere experimental verification that carbon dioxide is a green house gas (check for yourself), then you need to get into quantum physics. It comes down to photons and baryons interacting, after all.
If you are interested in experimental evidence of the GHG potential of carbon dioxide, here is a secondary school type experiment to get you pointed in the right direction:
