Where can we learn from to me make a better city? Well there are some good examples in the world, and one which constantly achieves new possibilities in urban planning comes from a city in Brazil called Curitiba. With around 1.8 million inhabitants Curitiba earned highest attention while they were imposing in the 70ies a new rapid bus system. One of the masterminds behind those plans is Jamie Lerner, urban planner and former mayor of Curitiba. In the year 2007 the city was also announced to be one of the 15 greenest cities on earth. Lerner describes in a short report called City of Dreams about the main concept of more a sustainable Curitiba.