When the planners built the city of Brasilia as the new capital of Brazil, 44 years ago, they believed that good design could solve society's ills.
Brasilia's city centre was built with distinct zones for residential, leisure, work, worship and government. Wide roads run through the centre, bypassing the residential superblocks to protect them from pollution and noise.
But now the city centre has changed beyond recognition and satellite towns are putting strain on the metropolis. Paula Gobbi visited Brasilia to hear about the problems of living in a city that started its life on paper.