Since 1990, the Intergovernmental Panel on Climate Change (IPCC) has produced regular assessments of the state of climate science and also provided reports on particular aspects of climate science when requested by the United Nations, its primary sponsoring entity. The IPCC has long advertised itself as an unbiased and objective reporter on the state of climate science, and even otherwise independent-minded people often base arguments about the consequences of climate change on IPCC numbers.
