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Bike-sharing programs in various European cities allow commuters to pick up a bike in one place and drop it off at their destination, for a modest fee or (iv some cases) for free. A smart card is generally used for deposit and payment.
Benefits include physical and mental health, better quality of life (lower stress), less traffic, lower infrastructure costs,[verification needed] financial savings, and elimination of noise and air pollution for these passengers. It helps to create a a sustainable city.
One person switching from driving to cycling to work for a 10km trip each way saves 1.3 tonnes CO2 emissions a year. 
Notes and references
- SmartBike Facts, SmartBike, Dec 2008. Clear Channel, Web. 22 Feb 2010.
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