I would say touring on an e-bike is way more friendly to the environment as well as all the traffic and noise than cars bring. So better to see an e- bike on the Camino trail than a Hummer... Hehe. Although I thought the reason for the Camino is to walk or ride under your own power and reflect ? I would say biking or running immediately puts u in touch again with the scource... What ever that means to you ,,because as you need clean air and energy to move ,,you become aware of where it all comes from.. And it is not from a gas can...