Funny you should say that, but I use that all the time when arguing with those that believe, without basis, in global warming. I'll tell them that the real reason is the increased obesity in America. The fun part is when I explain my theory is based on the fact that humans have to continually produce heat to remain at 98.6. It stands to reason that a 250 lb person produces a far greater amount of heat than a 150 lb person, and that this heat is constantly being radiated out into the atmosphere.
They say thats rediculous, so I say "ok, explain how your theory works" and 95 out of 100 are reduced to something like "well, everyone knows its true". kind of a fun game to play on a rainy day if you are stuck with liberals
Remind them that it takes more fuel to carry Gore's ever widening backside around in his SUV than it used to just a few pounds ago.