Brazil's "marvelous city" prepares for Rio+20Listen /
Delegates are arriving in Rio de Janeiro, Brazil, to participate in the UN Conference on Sustainable Development.
On Wednesday they are starting the final round of negotiations ahead of the conference, known as Rio+20, which runs from 20-22 June.
Meanwhile, hundreds of side events are taking place before the official start as preparations continue at the conference site.
Dianne Penn reports from Rio.