Simon:
Most charts are propaganda, with selective starting points (and different ones for different factors).
Some may be, but its hard to argue the evidence from ice core samples. They show a fairly stable level of co2 over the last 800 thousand years. During that time, co2 levels didnt exceed 300ppm. Around 1950, co2 levels broke out and are now at about 420ppm. It only took 60 years to break out of an 800 thousand year cycle.
Temperature increases precede CO2 rise (it's not "cause and effect")
I cant find anything that backs this up. Im not saying it isnt true, a link would be great.