The G8+5 group of leaders consists of the heads of government from the G8 nations (Canada, France, Germany, Italy, Japan, Russia, the United Kingdom and the United States), plus the heads of government of the five leading emerging economies (Brazil, China, India, Mexico and South Africa).

On February 16, 2007, The Global Legislators Organisation (GLOBE International) held a meeting of the G8+5 Climate Change Dialogue at the GLOBE Washington Legislators Forum in Washington, D.C., where a non-binding agreement was reached to cooperate on tackling global warming. The group accepted that the existence of man-made climate change was beyond doubt, and that there should be a global system of emission caps and carbon emissions trading applying to both industrialized nations and developing countries. The group hoped this policy to be in place by 2009, to supersede the Kyoto Protocol, the first phase of which expires in 2012.

The G8+5 group was formed in 2005 when Tony Blair, then Prime Minister of the United Kingdom, in his role as host of the 31st G8 summit at Gleneagles, Scotland, invited the leading emerging countries to join the talks. The hope was that this would form a stronger and more representative group that would inject fresh impetus into the trade talks at Doha, and the need to achieve a deeper cooperation on climate change.