Jul. 22, 2012 at 5:55am
marijuanaRio+20weedlegalizationsmokeprohibition
A man smokes marijuana during a march for the legalization of marijuana during the People’s Summit at Rio+20 in Rio de Janeiro, on June 19, 2012. (Reuters/Ricardo Moraes)

A man smokes marijuana during a march for the legalization of marijuana during the People’s Summit at Rio+20 in Rio de Janeiro, on June 19, 2012. (Reuters/Ricardo Moraes)