As an example ….
Kinetic speed bumps that generate electricity as vehicles drive over them (effectively prototyped by at least one engineering team in the nineties – the prototype lasted for years) – an example today reportedly requires just 400 vehicles a day for one speed bump to produce around 6GWh a year (as much energy as a full-size wind turbine and easily integrated into urban environments) A few roads in many cities have 400 vehicles a day, a kinetic speed bump or two or more at the entrance of every bus terminus, car parks, sporting stadium would generate a bit of electricity.
In rural areas place a few kinetic speed bumps in a warehouse and have an autonomous vehicle drive back and forward over them all day – weather proof, low cost, non polluting, reliable, easy to construct and repair components, produce instantly on demand, surge capable electricity. Have a few extra kinetic speed bumps to cater for surge demand. Producing electricity is easy.
A few multi-level car parks filled with kinetic speed bumps and autonomous vehicles driving over them can easily produce enough reliable, low cost, non polluting electricity. Piezo is great.
Reduced land size requirements compared to fossil fuel electricity plants, zero greenhouse emissions, significantly more reliable and lower cost than coal – switching off coal use is effortless.
The positive effects unlimited, free (low cost), non polluting electricity gives to society and economies is enormous (reduces costs, increased productivity, no shortages, Oppenheimer phrased it well)
(wonder what amount of electricity shock absorbers on electric vehicles produces – very cool)