Changes

Every three years, the [[World Energy Council]] (WEC) publishes its ''Survey of Energy Resources'', of which the most recent edition was released in 20042010.<ref>[http://www.worldenergy.org/publications/3243040.asp ''Survey of Energy Resources'',] World Energy Council 20042010.</ref> The WEC's survey is widely used and is the basis for estimates by the International Energy Agency (''World Energy Outlook''<ref>[http://www.worldenergyoutlook.org/ ''World Energy Outlook'',] International Energy Agency</ref>), the U.S. Energy Information Administration (''International Energy Outlook''<ref>[http://www.eia.doe.gov/oiaf/ieo/coal.html ''International Energy Outlook 2008'',] Energy Information Administration</ref>), and British Petroleum (''Statistical Review of World Energy''<ref>[http://www.bp.com/productlanding.do?categoryId=6929&contentId=7044622 ''Statistical Review of World Energy'',] British Petroleum</ref>).