Desertification is a type of land degradation in which a relatively dry territory region becomes progressively arid, typically losing the bodies of water as well as vegetation and wild animals. It is the result of a variety of factors, such as local weather change and human being activities. Desertification has played an important role in history, contributing to the particular collapse of a number of large empires, including Carthage, Greece, plus the Roman Empire, as well as causing displacement involving local populations.