his best estimate is that the  warming in response to a doubling of co2 concentration, which may happen  this century unless the usual suspects get away with shutting down the  economies of the west, will be a harmless 1 fahrenheit degree, not the 6  f predicted by the ipcc."
his best estimate is that the  warming in response to a doubling of co2 concentration, which may happen  this century unless the usual suspects get away with shutting down the  economies of the west, will be a harmless 1 fahrenheit degree, not the 6  f predicted by the ipcc."
ipcc third assessment report:12
the tar estimate for the climate sensitivity is 1.5 to 4.5 °c; and the average surface temperature is projected to increase by 1.4 to 5.8 celsius degrees over the period 1990 to 2100, and the sea level is projected to rise by 0.1 to 0.9 metres over the same period.