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In its First Assessment Report (FAR) in 1991 the IPCC reported the alarming forecasts from the climate models that had led to its formation but said of 20th century warming, “A global warming of larger size has almost certainly occurred at least once since the end of the last glaciation without any appreciable increase in greenhouse gases. Because we do not understand the reasons for these past warming events, it is not yet possible to attribute a specific proportion of the recent, smaller warming to an increase of greenhouse gases.”
Then the IPCC changed their figures and 'omitted' the reference to previous warmer periods. How (in)convenient!
In its First Assessment Report (FAR) in 1991 the IPCC reported the alarming forecasts from the climate models that had led to its formation but said of 20th century warming, “A global warming of larger size has almost certainly occurred at least once since the end of the last glaciation without any appreciable increase in greenhouse gases. Because we do not understand the reasons for these past warming events, it is not yet possible to attribute a specific proportion of the recent, smaller warming to an increase of greenhouse gases.”
Then the IPCC changed their figures and 'omitted' the reference to previous warmer periods. How (in)convenient!