Ha, nice try, Andy, but it doesn't quite work. According to Simon Jenkins (in the Gu*rdi*n, so illiberals beware), "steam engines of course burn coal, and coal is dirty. There is no way it can be “cleaned” on board a train. But nor is generating electricity entirely carbon-free. The total amount of carbon at issue is minimal, and almost all its pollution is outside towns. It could be matched by emissions certificates." (https://www.theguardian.com/commentisfree/2018/feb/12/diesel-steam-trains-rail-electricity)
I think that makes it Steam 1 Diesels 0.
Richard Carter ● 2674d