Well, I have heard that there are bicycles that require no source of energy except that provided by the rider, and create no pollution except from the CO2 emitted by the rider, or possible flatulence. I have never heard of one going up in flames.
no source of energy except that provided by the rider
= = =
That sounds like ableism.
CO2 emitted?
Zero Tolerance. Stop every CO2 emitter from emitteing.
Thankfully, cows don’t ride bikes.