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Why not? It sounds like you think this is obvious, but it isn’t to me. I live in an area with occasional grandfathered-in exceptions to zoning rules. There’s a cafe run out of a house, and a butcher shop run on a residential street corner between houses. And its absolutely lovely! I would have no problem with people making things (“a factory”) next to a school.
> I would have no problem with people making things (“a factory”) next to a school. yes you would, if it were a large plastics manufacturer bringing large amounts of truck traffic and noise pollution and spewing carcinogenic PCB compounds into local atmosphere.
Gigantic factories don’t want to be on small residential streets anyway because they cant fit the trucks in, so I think that argument cuts the other way - there are natural forces that deter that stuff.