The clip portrays the innovative work of former Mayor of Curitiba (Brazil), Jaime Lerner, who was responsible for developing an efficient public transport system (the MetroBus), and a clever system of sorting of waste (Cambio verde), which offers to the poorest urban dwellers the possibility to exchange recyclable waste for fruits and vegetables. You can also watch this, as well as many other documentaries on the subject at: http://www.unesco.org/archives/multimedia
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