http://www.youtube.com/watch?feature=player_detailpage&v=52Mx0_8YEtg#t=2359
The link takes you to a part in a video that explains this, but if you have time I encourage you watch the whole movie
If you can spare an hour for this, I would suggest following it up with reading http://en.wikipedia.org/wiki/The_Great_Global_Warming_Swindle and in particular the "Reception and Criticism" portion.
wikipedia is one of the biggest piles of shit out there, Im not surprised your attracted to that site. You can change the information like they do at the IPCC to meet your needs. The purpose of the graph is to show you that humans arent responsible for spikes in temp and co2 because we werent here! What do you have to say about the IPCC getting caught faking data and colluding in emails. If there is any kind of threat, why would they have to do this? I bet you these scientist will gain from carbon taxes.
Utter loony rubbish. Wikipedia has been repeatedly shown to be just as accurate as other sources of information. You don't understand how the editors etc on Wikipedia work. Seriously though, go google "wikipedia accuracy". No 1 source is perfect, not sure why you would have an issue with wikipedia. You sure as hell can't complain about reddit if you have issues with how wikipedia works.
The fact that there have been spikes in the past 100s of thousands of years, has nothing to do with the subject of manmade global warming which is far far far far more rapid. Your point is nonsense. One does not follow from the other. I could explain with an analogy but the loony tunes around here still wouldn't get it.
I have no opinion on IPCC. I remember something about this back when it happened, but it isn't particularly strong evidence that manmade global warming is no occurring. If you say so tho, bub.