Former U.S. Vice President Al Gore addresses the audience during an annual week technology festival "Campus Party" conference in Mexico City

 
Former U.S. Vice President Al Gore addresses the audience during an annual week technology festival "Campus Party" conference in Mexico City
Former U.S. Vice President Al Gore addresses the audience during an annual week technology festival "Campus Party" conference in Mexico City July 19, 2011. REUTERS/Carlos Jasso (MEXICO - Tags: SCI TECH POLITICS)