Curitiba's Mayor, Luciano Ducci and Secretary of International Relations, Eduardo Guimaraes, gives us insights into the public transportation system of Curitiba and how it is upgrading it to be more green like using biofuel. Curitiba in Brazil is said to be the most sustainable city in the world due to an efficient public transportation system and the Malaysian Institute of Planners have picked this city for Kuala Lumpur to emulate.

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