Rio+20 summit asks our children: what environmental future do you want?
Panel including Leonardo DiCaprio, Linkin Park and Christiana Figueres to judge video competition for Rio+20 earth summit.
It's not often 12-year-old girls address world leaders at international summits. But that was just what happened two decades ago when Severn Suzuki admonished delegates at the original Rio Earth summit for failing to address the world's environmental and social problems: