A. A. A. Unlike osteoarthritis, a condition caused by wear and tear on joints, rheumatoid arthritis happens when your immune system targets your joint linings. Itâs a long-term condition that also affects other tissue, but the joints are usually the most severely affected.
Homefacts City Report. Greenfield is located in Milwaukee County, WI. The population is 36,892, making Greenfield the 4th largest city in Milwaukee County. There are 0 public schools in Greenfield with an average Homefacts rating of NA. The total crime rate for Greenfield is low, and there are 0 registered sex offenders residing in the city.
Greenfield, as the only community in the county with a population over 10,000, is the largest community by population or population density in the county. It is also the smallest mainland county seat in the Commonwealth, as only the island towns of Edgartown and Nantucket are smaller.