Imagine.

A human experiment turns Bogota, Columbia into a nice place to live.

During his tenure as mayor of Bogota, Colombia, Enrique Penalosa was both revered and scorned for his urban planning and transportation policies. His public works projects, which largely favored the pedestrian experience, were unlike anything previously built in Bogotá. Penalosa describes the environmental and social importance of minimizing automobile culture.

Very inspiring.

See more at e² at PBS.