United Nations countries belong to an organization called the Intergovernmental Panel on Climate Change (IPCC), which publishes a report every six years. Often referred to as the "climate bible" these reports are relied on by governments around the world.
The latest was released in 2007. Sometimes called the AR4 (the Fourth Assessment Report), it contains 44 chapters and is nearly 3,000 pages long. Written by people organized into teams - Working Group 1, 2 and 3 - it consists of three smaller reports bundled into one.
The chairman of the IPCC has repeatedly said the report relies solely on peer-reviewed literature to support its findings. He has said research that hasn't appeared in peer-reviewed journals should be thrown "into the dustbin" (see the last line of this newspaper article). But our audit has discovered almost 5,600 non-peer-reviewed references in this report.
In elementary schools in the United States, students are assigned grades ranging from an A to an F, based on the mark they've achieved out of 100 (see Wikipedia's table here). Most parents would be alarmed if their child brought home a report card similar to the one received by the IPCC.