U.N. chief Ban Ki-moon has called for a show of “political courage” to seize the “once-in-a-generation” opportunity presented by Rio+20. Credit: UN Photo/JC McIlwaine

By Kitty Stapp Reprint | | Print |

U.N. chief Ban Ki-moon has called for a show of "political courage" to seize the "once-in-a-generation" opportunity presented by Rio+20. Credit: UN Photo/JC McIlwaine