Well it does not take much to get your own idea of global warming. Here are two lists of temperature anomalies, load them into Matlab or Octave and plot them out.
http://www.geo.utexas.edu/courses/325K/data%20files/NHTempAnom.txt
http://www.geo.utexas.edu/courses/325K/data%20files/SHTempAnom.txt
When doing it though be careful as you should probably exclude all data prior to 1960, as the accuracy of temperature readings from the time before satellites was not that great.
The real problem is that this does not tell you much. We have a small time sample, and out understanding of global climate is immature at best making just applying a linear trend to this may not be the best method. You will see a lot of models posted by climate researchers out there but they are hard to trust as what sort of regularization was done in their models is never mentioned. The combination of those things makes predictions on global warming I think pointless. On the other hand the basic point that CO2, CH4, and water vapor block the transmission of long period light back to space does help to support the idea that there is something going on with the a rise in global temperature.
Proud member of the Sonic Support Squad
