In 2011, the Nongovernmental Panel on Climate Change (NIPCC) published Climate Change Reconsidered: 2011 Interim Report, a 400-page report containing summaries and analysis of scientific research published since the original 2009 edition of Climate Change Reconsidered. While not as comprehensive as the 2009 report, the Interim Report contains reviews of nearly 1,000 new research studies covering subjects including computer models, forcings and feedbacks, paeloclimate and recent temperatures, and more.

According to the report, “natural causes are very likely to be [the] dominant” cause of climate change that took place in the twentieth and at the start of the twenty-first centuries. “We are not saying anthropogenic greenhouse gases (GHG) cannot produce some warming or have not in the past. Our conclusion is that the evidence shows they are not playing a substantial role.”