1 Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
2 Carbon dioxide is a trace gas and by itself will produce little
warming. Also, as CO2 increases, the incremental warming is less, as the
effect is logarithmic so the more CO2, the less warming it produces.
3 CO2 has been totally uncorrelated with temperature over the last decade, and significantly negative since 2002.