Windmills on the roof of cars to generate electricity for an all electric cars.
This may be a perpetual energy mechanism because the faster you go the more wind will hit the blades of the windmill.
Note; All windmills must meet height requirements to go under bridges and into tunnels.
Was it Princess Smallpox who thought Dutch skaters actually trained on the canals? In the winter the Interstate canals will freeze over and everybody can skate to work!
LOL! While our universe defies the perpetual energy concept I think your line of thought may result in more efficiency. Carry on!
I was thinking we should capture all the obnoxious gas emitted by Democrat politicians when they lie and alter facts but realized that stuff will corrode any containment system.