New Scientist: Not entirely. The IPCC scientists admit that some potential positive feedbacks from climate change have not been included in their model assessments of future temperatures. This is because they cannot yet be quantified sufficiently well.
For example, there is irritation that the report has sidelined the fear that methane, a potent greenhouse gas, may be released into the air in large quantities from melting permafrost and warming ocean beds. This would accelerate warming.
As a result the new...