In September 2009, at the Pittsburgh Summit, G-20 leaders recognized that "inefficient fossil-fuel subsidies encourage wasteful consumption, distort markets, impede investment in clean energy sources and undermine efforts to deal with climate change", and committed to phase out and rationalize inefficient fossil-fuel subsidies that lead to wasteful consumption. This GSI policy brief summarizes what G-20 countries have done so far, and what else needs to be done, focusing in particular on the outcomes that need to result from the next G-20 summit, set to take place in Toronto, Canada, on the 26-27 June 2010.