This is a recent rebuttal study to the 2007 U.N. IPCC 4th Assessment Report on Global Warming. It is published by the National Center for Policy Analysis, an independent think tank consulting group.

It is interesting, and includes a temperature chart that refutes the hockey stick temperature chart that Al Gore loves.

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Climate Change Forecasters on the Hot Seat
Brief Analysis
No. 609
February 18, 2008
http://www.ncpa.org/pub/ba/ba609/

by H. Sterling Burnett

More than 20 years ago, climate scientists began to sound the alarm over the possibility that global temperatures were rising due to human activities, such as deforestation and the burning of fossil fuels. In 1988, the World Meteorological Organization and the United Nations Environment Program created the Intergovernmental Panel on Climate Change (IPCC) in order to study and better understand this potential threat. The IPCC’s mission was to provide a “comprehensive, objective, scientific, technical and socio-economic assessment of human-caused climate change, its potential impacts and options for adaptation and mitigation.”