June 21, 2012
Brazilian Bororo indians dance during the opening ceremony of the Indian Green Games in Kari-Oca indian village in Jacarepagua, Rio de Janeiro, on June 14, 2012 as part of the UN Rio+20 environmental summit. (Antonio Scorza/AFP/Getty Images) Rio+20 InFocus

Brazilian Bororo indians dance during the opening ceremony of the Indian Green Games in Kari-Oca indian village in Jacarepagua, Rio de Janeiro, on June 14, 2012 as part of the UN Rio+20 environmental summit. (Antonio Scorza/AFP/Getty Images) Rio+20 InFocus

June 21, 2012
Indigenous people squeeze into a subway train as they ride to the People’s Summit for Social and Environmental Justice in defense of the commons, a parallel event taking place alongside Rio+20, in Rio de Janeiro, on June 18, 2012. (AP Photo/Felipe Dana) Rio+20 - InFocus

Indigenous people squeeze into a subway train as they ride to the People’s Summit for Social and Environmental Justice in defense of the commons, a parallel event taking place alongside Rio+20, in Rio de Janeiro, on June 18, 2012. (AP Photo/Felipe Dana) Rio+20 - InFocus