Nature: Environmental icon Marina Silva may struggle to advance her environment agenda if elected president.
Marina Silva rose from poverty deep in the Amazon jungle to become a prominent politician and the advocate who kick-started Brazils battle against deforestation. Now she is clashing with an old foe, President Dilma Rousseff, in a wild election that could reshape the nations environmental policy.
Silvas sudden ascent is almost as shocking as the event that prompted it: a plane crash on 13...