[basjoos]

If the climate is getting warmer, how come we can't grow oranges as far north as they could in the late 1800's? In Mark Twain's ' Life on the Mississippi', published in the 1880's, he describes Natchez as the furtherest north place along the Mississippi where they can grow oranges outside without protection and that from that point on south orange trees were commonly seen growing. Today New Orleans is the northernmost location where you can grow oranges outside without protection and oranges are commonly grown south of the city on the delta.

Also in 'The Escape of General Breckinridge', a journal documenting the escape of Confederate secretary of war General John Breckinridge and his military staff from union forces at the end of the Civil War by travelling the length of Florida to Cuba, they describe collecting coconuts from abandoned homesteads on Merritt island, a location too far north and too cold to grow coconuts today. You have to go south to Jupiter Inlet to find coconuts growing today. This is a fascinating read if you are familiar with those parts of Florida today, as they go into great detail describing the land they are passing through and includes details such as the techniques they used to cope with the mosquitoes and biting flies that tormented them in the days before DEET.

They might be able to diddle with temperature databases to try to prove warming or the lack thereof, but they can't change the references in classic literature describing locations where frost sensitive crops were being grown at the time it was written.