Body farms subject donated cadavers to various environmental conditions to study the process of human decomposition. These include The University of Tennessees Forensic Anthropologic Facility, Western Carolina Universities Osteology Research Station (FOREST), Texas State Universitys Forensic Anthropology Research Facility (FARF), Sam Houston State Universitys Southeast Texas Applied Forensic Science Facility (STAFS), Southern Illinois Universitys Complex for Forensic Anthropology Research, and Colorado Mesa University's Forensic Investigation Research Station. The Australian Facility for Taphonomic Experimental Research, near Sydney, is the first body farm located outside of the United States  In the United Kingdom there are several facilities which, instead of using human remains or cadavers, use dead pigs to study the decomposition process. Pigs are less likely to have infectious diseases than human cadavers, and are more readily available without any concern for ethical issues, but a human body farm is still highly sought after for further research. Each body farm is unique in its environmental make-up, giving researchers a broader knowledge, and allowing research into how different environmental factors can affect the rate of decomposition significantly such as humidity, sun exposure, rain or snow, altitude level and more.