What makes a city smart? Is it cutting edge technology? Or state of the art infrastructure. Is it top down control? Or giving power to the people? Eco-architect Jason Pomeroy asks these questions of, Songdo in South Korea.

The Japan earthquake and tsunami of March 11, 2011 taught the country an unforgettable lesson. Rebuild cities as smarter cities, or risk another unthinkable disaster.

Bandung city in Indonesia is a city so charming that it used to be called the Paris of West Java. But its also a city facing urban challenges that is pushing its resources to the limit.

Singapore has achieved stunning economic growth in just over 50 years, and now, the city-state is setting its sights on the next frontier - smart nationhood.

It wants to be one of the first smart cities in India, but it's also struggling to solve 18th and 19th century problems like sanitation. Jason visits Ahmedabad to find out if a smart city will improve the lives of its people.

Full of history, Barcelona has reinvented itself time and again to become one of the world’s most influential cities. Today, the smart city of Barcelona is not the smart city it was five years ago, we find out more.