Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-20th century and its projected continuation. Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the … see full wiki
I'm not so sure 100 years of data gives one the ability to project 100 years into the future. Where is this graph from? What are those acronyms?
I see it now... all linked from Wikipedia. Acronyms are of institutions taking the measurements, which is odd because in the 70's there was a big "global cooling scare". There isn't even 100 years of data in most of these lines, only the CCSR/NIES and CCCma.