NK has already been using coal powered buses; I believe an article was posted on this. And yes, passengers end up having to smell a lot of that smoke.
Well hell ...Fire up the smoker and it is a pleasant Valley sunday in Nork
The local rock group down the street
Is trying hard to learn their song
They serenade the weekend squire
Who just came out to mow his lawn
Another pleasant valley Sunday
Charcoal burning everywhere
Rows of houses that are all the same
And no one seems to care