Few would be willing to stay in, or move into, such a community for any reason other than employment. Odor ranks only 10 on my list because something could possibly be done to mitigate its impacts, such as using odor reducing technologies, compensating those most affected, and restricting location to minimize impacts of the greater community. The work is not good for people . A large confinement hog facility is not a pleasant place to work. Known health risks are associated with continuously breathing the air that arises from manure pits in confinement hog facilities.
Health problems cost money in lost wages and health care costs.
But more important, an unhealthy workplace can destroy peoples' lives. History has proven that people will choose to work in dangerous work environments when they are desperate for jobs. Health risks can be life threatening, so I rank worker safety above odor problems. But as in the case of odor, health problems can be mitigated by protecting workers from the noxious fumes, by limiting exposure, and by keeping people with other health problems out of confinement facilities. If you spread out the hogs and let hog manure lay where it falls in a pasture, it doesn't bother anyone very much.