Why are European cities charming and American cities often so charmless? Simple, says urbanist Alain Bertaud: most American cities are zoned for single-family housing. The result is not enough customers within walking distance of a business, and not enough parking for the customers who drive. Why American cities are zoned that way is related to culture and history. Hear Bertaud and EconTalk's Russ Roberts talk about urban problems and how to solve them--not through urban design or planning, but by respecting what makes each place unique.