Hybrid Public Bike

I think this is a really cool concept: a bike with a energy storing dynamo in the wheel so that after you rent the bike, stored energy from riding/braking is collected by the bike drop-off points and used as energy for the buses. Even cooler is the fact that you use a card that collects credits as you store more energy and after collecting a certain amount of energy, your bus ride is free.
This is one of the greatest “green” ideas I’ve heard in a long time.
I just don’t know what would prevent bike theft.
