Is man-madeglobal warming a scientific reality? We show that this is not the case by dealing with the following facts: I. Temperature measurements for the last 150 years are doubtful - II. The complex models dealing with the forecasts about the impact of greenhouse gases on the global temperature have a low, if any, predictive capacity - III. Also the models developed for the carbon cycle are far from being satisfactory - IV. The cause of global warming (if any) could be solar activity rather than greenhouse gases emissions - V. The choice of the Chairman of the Intergovernmental Panel on Climate Change (IPCC) is politically biased - VI. The Policymakers Summaries prepared by the IPCCare as well politically biased towards doomsday predictions - VII. It may however be possible to conclude that the impact of the IPCCmay be of some use in fostering environmental policies.