Is natural variability a factor in past warming?
Wednesday, February 4th, 2009The best estimate from the IPCC is that the global average temperature of the earth’s surface has increased a 0.6ºC (+/- 0.2ºC) over the last 100 years.
When the objection is raised that this past increase is a natural phenomenon – as opposed to the consequence of human greenhouse gases’ emissions – the implicit foregone [...]

