A car that would stick to walls and upside down tunnels using fans to propel it up and stick
Space Elevator
A space elevator that runs on electricity and is powered by solar panels when it reaches the top because it is so close and can harness much of the sun's energy
Water powered bobsled:
Having a bobsled charge a battery using hydropower when going downhill and then having it in use when going uphill
Drone transport:
Having a drone transport people by electricity from solar pannels
Volcano train
A fast train that goes through volcanoes and is powered by geothermal energy at every volcano stop.
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