A peak in media coverage occurred in early 2007 , driven by the IPCC Fourth Assessment Report and Al Gore 's documentary '' An Inconvenient Truth '' . A subsequent peak in late 2009 , which was 50 % higher , may have been driven by a combination of the November 2009 Climatic Research Unit email controversy and December 2009 United Nations Climate Change Conference
Climatic Research Unit email controversy
Climatic Research Unit email controversy
Media coverage of global warming