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If you take public transport, cycle or walk in Vienna, you stand to gain more than fresh air and exercise, with the city unveiling an app to reward car-free travel with free concert and museum tickets.

The app works through a tracking system that recognises the mode of transport used and calculates the CO2 savings in comparison to taking a car.

Users get one token as soon as they have saved 20 kilogrammes of CO2 and the tokens can be exchanged for free tickets at four participating cultural institutions. The Vienna Museum of the city’s history, an art exhibition space, a theatre and a classical concert venue are taking part.

Source: The Local