When the U.N. scientific body known as the IPCC came out with its Fourth Assessment Report, many claimed that this was yet more proof validating concerns over global warming. But according to a new study by the National Center for Policy Analysis, the UN’s global warming report had many shortcomings. Comments study author, Professor J. Scott Armstrong: “Out of the 140 forecasting principles used, 127 principles are relevant to the procedures used to arrive at the climate projections in the U.N. report. Of these 127, the methods described in the report violated 60 principles. By producing a report that carries with it a host of violations, the global warming projections in the report are scientifically invalid.”