Superblocks to the Rescue?

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In Barcelona, they are experimenting with a new way of designing the city. Superblocks are vast low-traffic zones, but they are also deeply controversial. The aim is cut pollution and reclaim public space from the car, but does it work? World Hacks investigates. Also on the programme, we hear advice from Antarctica on how to stay warm in the cold snap. (Photo: A superblock from above. Credit: Google Maps)