Harvesting the energy of vehicle and pedestrian traffic
By placing bellows underneath the concrete on roads and sidewalks, energy can be generated when pedestrians or vehicles apply weight to the ground. When weight is applied on the surface the bellows push air through an electricity generating turbine.
This technology can be applied rather cheaply and easily as the infrastructure is already in place.
So much energy is spent traveling. If we can reclaim some of that energy then we can start moving closer to renewability, by recycling our own energy.
Please indicate which type of energy is most relevant to this post
A combination of various types of renewable energy