Many hundreds of scientists from different countries were involved as contributors and reviewers for these reports, which are probably the most comprehensive and thorough international assessments on any scientific subject ever carried out. In June 1995, just before the G-8 summit in Scotland, the Academies of Science of the world’s 11 largest economies (the G-8 plus India, China, and Brazil) issued a statement endorsing the IPCC’s conclusions and urging world governments to take urgent action to address climate change.