I was going to comment that I'm glad to see the diesel smoking it up more than the steamer.
A number of years ago I went to Conway Scenic RR in NH for their Railfan days. They were running steamer 7470 that day, as well as diesels. Someone approached me and asked if I'd be willing to take pictures of the steam engine for him as they'd forgotten their camera, which I said I'd be glad to do. He then made the mistake of telling me he was hoping to get the railroad to stop running steam because of the pollution. I told him then that nobody there that day would be willing to help him.