Understanding the physiology of human smell can help a farmer to better understand non-farm neighbors, and to consider odor issues, off-farm impacts, and potential solutions. An effective neighbor relations plan may start with a farmer conceding that his/her detection of manure-based odors is likely compromised, given the fact that constant exposure to these odors results in odor fatigue (see Part 2). Farmers may not even detect what a non-farm audience would describe as an offensive odor.