The Straight Facts About CO2 and AGW

A long compilation I assembled of competing explanations of CO2's role as a greenhouse gas, from the simple 'blanket' analogy to a more detailed treatment of infrared absorption bands.

The thread I found most interesting is the saturation argument: that CO2 absorbs IR only in narrow wavelength bands, that it competes with water vapor there, and that beyond a certain concentration additional CO2 has diminishing effect. I laid out the standard answers alongside the skeptical one and let readers weigh them.

(This is a compilation of arguments I found persuasive at the time; the saturation argument is disputed in the mainstream climate-science literature.)