I honestly don't remember a strong smell, but I'm pretty sure it was just the smell of milk so only arguably better than a paper mill if you like milk I guess, which I didn't and still do not to this day - which was a real shame because it was an early morning field trip so they did not give us ice cream; they asked us what milk we wanted.... (they also produced milk there though so it wasn't like they were just scooping some milk off the ice cream production line before it was mixed in fwiw lmao)