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."
climate sensitivity:66
the 1990 ipcc first assessment report estimated that equilibrium climate sensitivity to a doubling of co 2 lay between 1.5 and 4.5 °c (2.7 and 8.1 °f), with a "best guess in the light of current knowledge" of 2.5 °c (4.5 °f).