AFPGiant, 10-day-long UN conference on sustainable development gets underway in ...Washington PostRIO DE JANEIRO — The United Nations' largest-ever conference has kicked off in Rio de Janeiro. The Rio+20 conference on sustainable development is expected to draw some 50000 participants including delegates, environmental activists, business leaders ...Giant UN conference opens in Rio de JaneiroAtlanta Journal ConstitutionUN Conference on Sustainable DevelopmentHouston Chronicleall 444 news articles »