Problem:
What does Sao Paulo's outer ring consist of? Responses high income elite residents that have moved away from the polluted city center high income elite residents that have moved away from the polluted city center informal settlements, self built by resident "squatters" using any spare materials available informal settlements, self built by resident "squatters" using any spare materials available middle class residents who have moved to the rapidly expanding suburban neighborhoods middle class residents who have moved to the rapidly expanding suburban neighborhoods formal low income housing provided by the local city government