text: In BOGOTA, Colombia a program started for a car-free-day.  Only buses and taxis are allowed to be driven.  "It's a good opportunity to take away stress and lower air pollution," said businessman Carlos Arturo Plaza as he rode a two-seat bicycle with his wife.  People who didn't participate suffered a 25 dollar fine.  Bogota made 118 miles of bike paths since the car-free-day.