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news article: http://www.cnn.com/2008/TECH/science/11/21/climate.danger.zone/index.html original report: http://snre.ufl.edu/common/humphrey/literature/Hansen2008TargetCO2.pdf Here are two reports verifying tipping points such as Hansen addresses: http://snre.ufl.edu/common/humphrey/literature/Schuur2008PermafrostCarbon.pdf http://snre.ufl.edu/common/humphrey/literature/Shakhova2008AbruptMethaneRelease.pdf Dr. Stephen R. Humphrey, Director of Academic Programs, School of Natural Resources and Environment, Box 116455, 103 Black Hall, University of Florida Gainesville, FL 32611-6455 USA Tel. 352-392-9230, Fax 352-392-9748 http://snre.ufl.edu<http://snre.ufl.edu/>