Roll on 'em, babe !

Sainsbury "rolls out" Kinetic energy plates in their store to capture energy from moving vehicles. "Energy will be captured every time a vehicle drives over "kinetic road plates" in the car park and then channelled back into the store."

Now you can drive in to your store and still feel good about it.
Oh wait a min ! "....the energy generated by the devices is not totally "free". Rather, they capture a tiny amount from each car that passes over them, increasing each vehicle's fuel consumption by a tiny
amount." !!