Some physical science elements of climate change and CO2's role: http://steve.cooleysekula.net/blog/2011/08/13/the-greenhouse-effect-part-1-temperature-and-thermodynamics/ http://steve.cooleysekula.net/blog/2011/08/16/the-greenhouse-effect-part-2-hot-car-hot-earth/ http://steve.cooleysekula.net/blog/2011/08/21/the-greenhouse-effect-part-3-gas-amplifier/