"Professor Chris Field, an author of a 2007 landmark report on climate change, said future temperatures "will be beyond anything" predicted.
...
"We are basically looking now at a future climate that is beyond anything that we've considered seriously in climate policy," he said.

Prof Field said the 2007 report, which predicted temperature rises between 1.1C and 6.4C over the next century, seriously underestimated the scale of the problem.

He said the increases in carbon dioxide have been caused, principally, by the burning of coal for electric power in India and China."

http://news.bbc.co.uk/2/hi/science/nature/7890988.stm

And no credit given to wise comments by Ted Turner:

"Ted Turner

The year 2040 will find the world's crops dead, most of the people in a similar state of decay, and those few left alive will be cannibals, according to a prediction from Ted Turner, founder of Turner Broadcasting and CNN."