The Second Assessment Report (SAR) of the Intergovernmental Panel on Climate Change (IPCC), published in 1995, is an assessment of the then available scientific and socio-economic information on climate change. The report was split into four parts: a synthesis to help interpret UNFCCC article 2, The Science of Climate Change (Working Group I), Impacts, Adaptations and Mitigation of Climate Change (WG II), Economic and Social Dimensions of Climate Change (WG III). Each of the last three parts was completed by a separate Working Group (WG), and each has a Summary for Policymakers (SPM) that represents a consensus of national representatives. The SPM of the WG I report contains the following statements: Greenhouse gas concentrations have continued to increase; anthropogenic aerosols tend to produce negative radiative forcings; climate has changed over the past century (air temperature has increased by between 0.3 and 0.6 °C since the late 19th century; this estimate has not significantly changed since the 1990 report); The balance of evidence suggests a discernible human influence on global climate (considerable progress since the 1990 report in distinguishing between natural and anthropogenic influences on climate, because of: including aerosols; coupled models; pattern-based studies). Climate is expected to continue to change in the future (increasing realism of simulations increases confidence; important uncertainties remain but are taken into account in the range of model projections). Finally, the report stated that there were still many uncertainties (estimates of future emissions and biogeochemical cycling; models; instrument data for model testing, assessment of variability, and detection studies). Overview The Second Assessment Report, titled Climate Change 1995, consists of reports from each of the three Working Groups, and a Synthesis Report: Report of Working Group I: The Science of Climate Change . Report of Working Group II: Impacts, Adaptations and Mitigation of Climate Change: Scientific-Technical Analyses . Report of Working Group III: Economic and Social Dimensions of Climate Change . The "Full Report", consisting of Synthesis of Scientific-Technical Information Relevant to Interpreting Article 2 of the UN Framework Convention on Climate Change, and the Summaries for Policymakers from the three Working Group reports . These reports were prepared by over two thousand experts, and "contain the factual basis of the issue of climate change, gleaned from available expert literature and further carefully reviewed by experts and governments." The Synthesis Report gave its purpose as providing the scientific, technical and socio-economic information for determining Conclusions Working Group