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IPCC (UN) Messages - The Scientific Basis

http://www.grida.no/climate/ipcc_tar/

• new and stronger evidence that most of the warming observed in the past 50 years is attributable to human activities

• atmospheric concentrations of greenhouse gases have continued to increase as a result of human activities

• the globally averaged surface temperature is projected to increase by 1.4 to 5.8oC over period 1990-2100

• Global-average surface temperatures increased about 0.6 oC in past 100 years, the 1990’s the warmest decade in past 1000 years.

There are those who dispute these conclusions and the linkage of increasing greenhouse gas emissions to rising temperatures. A recent book titled “The Skeptical Environmentalist” does and has come under intense scrutiny by the Scientific American. A series of articles reviewing the book under the general title “Misleading Math about the Earth” are published in the January 2002 issue of the Scientific American.