During his tenure as mayor of Bogotá, Colombia, Enrique Peñalosa 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. Peñalosa describes the environmental and social importance of minimizing automobile culture.

"e²: the economies of being environmentally conscious" is an ongoing PBS documentary series about solutions to the world's most pervasive environmental challenges. The 2007 season continues with "e² design season two", the flagship sustainable architecture series examining innovations in green building and planning from around the globe. Check your local PBS listings for television broadcast dates in your area.

The "e²" series and its video podcasts are produced by kontentreal, and distributed within the United States by PBS. More information is available at pbs.org/e2/ and e2-series.com/