CO2, again everybody posts their favorite "graph", or links to something they find on google. A serious joke. I see one glaring error. Some folks are stating that C02 is 3% of our atmosphere. It is not, it is around .04% CO2 does not trap the heat. If anything, all that extra CO2 makes that Earth cooler. Any radiation that heats a molecule of CO2 will lose energy. It will not gain energy, it will not retain energy longer. It will become weaker or at best stay the same. 99.96% of the radiation that enters our atmosphere never ever encounters or strikes or comes close to a molecule of CO2. It passes right on by. There is simply too little CO2. Any theory of CO2, any math, however you calculate, it is all a fools errand. CO2, it makes great ice.