Partially. The black/gray is wood or coal smoke. Still, they aren't as polluting as a lot of other vehicles that size, plus back when they were the norm pollution wasn't an issue yet.
"Indeed, the sight of an incoming vehicle weighing over fifty tonnes and travelling at 80 kilometres per hour towards my comparatively small body is a most picturesque--"
"CHOOCHOOOOOOOOOOooooOOOoooOOOAJCNKJASNCKJWMQWLKVJHBEWF."
"CHOOCHOOOOOOOOOOooooOOOoooOOOAJCNKJASNCKJWMQWLKVJHBEWF."