Short Global Warming Lesson [AN, PI, T]

A lot of people point to US climate data maintained by NASA, and how 1998 is the hottest year on record, which "proves" global warming. A lot of people do not know that NASA made a small error - essentially a 'Y2K' calculation error. 

The actual NASA data is available here, but the main summary is this:

1934 is now the hottest year on record, not 1998.

5 of the top 10 hottest years are before WWII.