Warmest since the 9th century. IOW this has happened before and without the use of the internal combustion engine.
fascinating.
i was taking a human geography course at the uofMinn last year. one of the subjects that the prof was high on was global warming. he gave a great lecture on how the 20th century was the warmest in 1100 years, it was very well graphed with great statistics that ended right at the 9th century. i asked him in lecture about why the stats ended at an odd year, after reading about this same thing earlier, he said that it didnt matter what had happened before, and that the stats prove that we are causing global warming.