I have never worked in a manufacturing plant or industrial sit with many buildings. But maybe one day after college. Yourslef?
No I never have but I have heard bad things, what do you think?
Where I live in Syracuse , New York it has been proliferated since the 1870's. It seems to be bad, but still going 
Oh that is interesting, I wonder how they have been able to do it?
During like the 1900s, about 87 large industries were scattered in Syracuse.