Sachstandsbericht des IPCC
In April 2008 Stern said that the severity of his findings were vindicated by the 2007 IPCC report and admitted that in the Stern Review, "We underestimated the risks [...] we underestimated the damage associated with temperature increases [...] and we underestimated the probabilities of temperature increases". In June 2008, Stern said that because climate change is happening faster than predicted, the cost to reduce carbon would be even higher, of about 2% of GDP instead of the 1% in the original report.