Vatican warns of 'green protectionism'
Position paper praises Rio+20 for environmental awareness but denounces technological solutions taken by nations
Brazilian army soldiers patrol the Copacabana beach June 11 ahead of the U.N. Rio+20 Conference on Sustainable Development in Rio de Janerio June 20-22. Delegates will gather at the summit to try to map a sustainable course for the world's 7 billion people. Ricardo Moraes / CNS.