Peddle your own bus-pass.
The system (by Chiyu Chen) is simple: a user rents a bike with an ID or credit card, charges it (the card) simply by using it, then plugs it back into the grid from which the energy is transferred to electric city buses. More riding makes more power means more credits the next time it is too cold, hot, wet or whatnot to ride a bike.
If you thought power-generating bicycles were brilliant by themselves, imagine if you could turn the energy you produce while bicycling into credits you can use anywhere else in the public transit system. Essentially, users are reimbursed for riding, emissions are reduced and everyone wins.