1975 Ford F250

Yes, indeed, and that will get way worse, I predict. Here, there is some technique that makes copious exhaust that is black as coal. It's legal, for some reason. I've seen it several times, always on a big pickup truck. My grandson told me about it and said it doesn't change the exhaust any other way, it's only for macho display. Still, hard to believe that a cloud of black exhaust does no harm. He scoffs as much as I do.