Economic growth usually goes alongside increased consumption and waste. But in Curitiba, Brazil, a scheme in which residents exchange rubbish for fresh fruit and vegetables leads to clean streets and healthy diets.

The Green Exchange Programme operates in 95 sites across the city and was introduced by former mayor Jaime Lerner.

Gelareh Darabi travels to the South American city to meet the visionary former mayor as well as locals benefitting from this and other initiatives such as public transport which sees buses arrive a stops every 90 seconds and grassy parklands trimmed by city sheep. 

 earthrise can be seen each week at the following times GMT: Tuesday: 2230; Wednesday: 0930; Thursday: 0330; Friday: 1630; Saturday: 2230; Sunday: 0930; Monday: 0330; Tuesday: 1630. 

Join the conversation on Facebook, or watch us on YouTube or follow us on Twitter.