text:  You know, you have to convert all the tracks. You have to have all the rails, either overhead or in the rails. It's very expensive, and we require billions and billions and billions of dollars to do that sort of conversion. It's not practical. No, and again, it isn't going to have any effect on global temperatures, which are dominated by nature, not man-made emissions, despite the push to do this. We talked a little bit about the green breakdown. How realistic is that?