In June 19 remarks delivered at the opening ceremony of a C40 group of cities climate change meeting in Rio de Janeiro, New York City Mayor Michael Bloomberg announced that a coalition of the world’s largest cities is advancing toward its goal of reducing annual greenhouse gas emissions by 250 MMT by 2020 and could quadruple that amount by 2030. Mayor Bloomberg said that even as international and national level progress on climate issues has faltered, cities have moved ahead with efforts to meet the goals of the U.N. Framework Convention on Climate Change set at the Earth Summit in Rio 20 years ago. The C40 group has grown to 59 cities, from 20 at its 2005 inception.