Being a meteorology major, this topic gets on my nerves haha. I can't say I entirely believe in it either, but I do know that global warming effects everything, from heavier rain, to droughts, to hurricanes, to cold. Because of this, it's extremely hard to tell if the earth is warming due to people or a natural cycle. Personally, I believe it's a natural cycle, because it's happened in the past. Droughts happen, records happen, rain happens, no matter if its an ice age or a warm globe. Either way, people are pumping more crap into the air, and it may be effecting temps a little, but I don't think it's 100% of the reason for it.