I'm trying to understand the issue of CO2 and global warming better. Can anyone explain to me the mechanism by which CO2 in particular converts infrared radiation to heat. I've had a semester of college chem and three semesters of physics, but I'm not sure what theory I should be able to use to predict that, for instance, when a certain frequency of light applied to x amount of CO2 will raise the temperature to y degrees. I've thought that maybe it has to do with the absorption spectra or emission spectra of CO2, or the specific heat of CO2, but I'm really not sure. Thanks for the help.