About every four years, the United Nation’s Intergovernmental Panel on Climate Change (IPCC) produces a voluminous Assessment Report (AR) on the state of global warming science, such as it is. Two years after each AR, the IPCC produces an updating Interim Report.
In 2008, The Heartland Institute, headquartered in Chicago, began organizing international conferences of scientists from across the globe who want to raise and discuss intellectually troubling questions and doubts regarding the theory that human activity is causing ultimately catastrophic global warming. Six conferences have taken place to date, attracting more than 3,000 scientists, journalists, and interested citizens from all over the world.
(Full disclosure: As indicated by my nearby bio, I am a Heartland Senior Fellow, one of several affiliations I have with free-market think tanks and advocacy groups.)
In 2009, Heartland published Climate Change Reconsidered: The Report of the Nongovernmental International Panel on Climate Change (NIPCC). That 860-page careful, dispassionate, thoroughly scientific volume, produced in conjunction with the Science and Environmental Policy Project (SEPP) and the Center for the Study of Carbon Dioxide and Global Change, explored the full range of alternative views to the UN’s IPCC. Two years later, Heartland published the 418 page Climate Change Reconsidered: The 2011 Interim Report of the NIPCC, which updated the research regarding global warming and “climate change” since the 2009 volume.