In September 2009, leaders of the Group of Twenty (G-20) largest industrialized and developing economies made a groundbreaking commitment to reform their fossil-fuel subsidies, in a bid to advance their energy security and climate change agendas. In doing so, leaders called upon their finance and energy Ministers to prepare implementation plans and timelines and asked international organizations to prepare an analytical background paper; both are to report back to the next Leaders' Summit, to be held 26-27 June 2010, in Toronto, Canada.