World in Progress: Madrid curbing smog with strict traffic rules

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04:49 mins.
To curb air pollution, Madrid now has some of the strictest restrictions for vehicles in Europe. Older cars are banned from entering the inner city, visitors will need special permission. Sidewalks are being widened, and the speed limit has been set at 30 km/h in many places. The decision has proved to be highly controversial — but the left-wing city government remains committed.

(Author: Marc Dugge / presenter: Neil King)

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