It isn't misleading. I state this in the first paragraph. > I ignore the potentially, important environmental impact of the manufacturing processes of the two

It isn't misleading. I state this in the first paragraph. > I ignore the potentially, important environmental impact of the manufacturing processes of the two types of vehicles. And in the second paragraph I discuss it further. >This is a naive and simplistic approach but it is a starting point and allows us to highlight this very important aspect of the topic. Furthermore, these values are still relevant in more complex calculations which take into account other factors like manufacturing, maintenance, longevity, etc