The Intergovernmental Panel on Climate Change (IPCC) was established by the United Nations to assess the scientific, technical, and socio-economic information relevant for understanding climate change, its impacts, and mitigation and adaptation measures.
This year, the IPCC released three major reports on climate change. The first assessed the scientific evidence that it is happening and that human are a major cause of it, the second examined the potential impacts, and the most recent report discussed mitigation and adaption options.
A fourth report is due out in November. This "synthesis report" will include the core findings of the first three reports and, according to the IPCC, will be "the most policy-relevant scientific document on climate change for the years to come."
via the Intergovernmental Panel on Climate Change