A History Of Science
The IPCC was established in 1988 by two UN organizations, the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) to answer rising concerns regarding climate change.
Since then, the IPCC has published four separate reports: one in 1990 and its supplement in 1992, a second known as “SAR" in 1995, a third known as “TAR" in 2001, and a fourth known as “AR4" in 2007:
That first assessement report deducted that at least half of the global warming effect was due to rising CO2 levels in the atmosphere. This authoritative conclusion, the metaresult of many independent scientific studies, led to the creation of the UN Framework Convention On Climate Change—another long acronym, UNFCCC. This treaty was an international aknowledgment of the possibility of climate change, which in turn later led to the creation of the famous Kyoto Protocol.
The second assessment elaborated on the first report considerably, mostly due to the larger pool of scientific data available for the board to so analyze—and ended with the same conclusions. The third assessment followed this trend, right into the fourth assessment.
Check out this link for both the long versions of the original assessement reports and the abridged versions. The abridged versions are highly recommended, being quite readable, and providing deep, valuable scientific insights into the reality of climate change—an area where fast and flimsy science is notorious for flying by many consumers.
The IPCC has been successful enough in its efforts to clarify the mess of science and policy surrounding climate change that it was jointly awarded the 2007 Nobel Peace Prize, along with environmental advocate and former Vice President of the United States Al Gore.