Cyclists pass by a tram in downtown Brussels, Sept 19, 2010. A car-free day activity was held in Brussels on Sunday to advocate environmental-friendly transportation and encourage people to use public transit. Private cars were forbidden on the road and public vehicles were free from 9 am to 7 pm on that day. [Photo/Xinhua]

A man covers a car with a hood imprinted with the slogan of the car-free day, meaning “I’m on holiday today.” [Photo/Xinhua]

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