The Group of Twenty, or G-20, is a forum for advancing economic co-operation among 20 major advanced and emerging-market countries. The G-20 was originally established to facilitate discussions among the G-20 finance ministers. The prominence of the G-20 increased with the onset of the global financial crisis in the fall of 2008, and the G-20 started meeting at the leader level. In September 2009, the G-20 leaders announced that, henceforth, the G-20 would be the "premier" forum for international economic co-operation. This book examines the major G-20 commitments that could influence or shape the policy and legislative agenda for international economic co-ordination; background and issues of the International Monetary Fund (IMF); the Paris Club and international debt relief; multilateral development banks; international climate change financing; international environmental financing; and The World Bank Group energy sector strategy.