You know what? Maybe carbon dioxide isn't the primary cause of global warming. It's cell phones. The second law of thermodynamics tells us, along with that perpetual motion machines are impossible, that a change of state for a closed system (the Earth, for example, is basically a closed system) is accompanied by an increase (or in very particular cases no change, but never a decrease) of entropy, qualitatively understood as "the state of disorder". This is why the process of making toast is not reversible. Go ahead. Try putting toast in the freezer and see if you get bread. Anyway, information is a lack of entropy. Rather, to produce information, you need to reduce the entropy locally. But then you need to increase it somewhere else. It's the law. The primary manifestation of entropy is heat. Think about it, a crystal is completely ordered. How do you disorder (more entropy) it? Heat it up. Cell phones transmit information. Now, when I say "information" I mean no implication of usefulness. For the purposes of thermodyamical interactions, "OMG, did you see what Jenny did?" represents order. Order being imposed somewhere within the system. Somewhere else within the system, entropy must increase. The proliferation of cell phones across the world has meant that this local imposition of information has increased in volume exponentially over the last 10 years at least. The cumulative effect of entropy augmentation must be the cause of warming.
[note: the preceding is an example of why physics should not be applied haphazardly to social situations]
