In Brazil, a former presidential candidate and environment minister has launched a new political party, Sustainability Network, ahead of next year's presidential elections.
In a speech to hundreds of supporters in the capital, Brasilia, Marina Silva stressed the party's green credentials.
According to Brazilian law, nearly 500,000 signatures are needed to officially register a party.
Ms Silva came third with nearly 20m votes in her 2010 presidential bid.
Launching the new party, Marina Silva ruled out taking either a pro or anti-government stance.
The former Amazon activist did not say whether she would run for president next year, although that is widely predicted.
Read the full story: BBC News