Saudi Arabia has three categories of land: developed land (amir), undeveloped land (mawat), and protective zones (harim). Developed land comprises the built environment of towns and villages and agriculturally developed land, and can be bought, sold and inherited by individuals. The undeveloped land comprises rough grazing, pasture and wilderness. Rough grazing and pasture is owned in common and everyone has equal rights to its use. The wilderness is owned by the state and may be open to everyone unless specific restrictions are imposed. Harim land is a protective buffer between the owned land and the undeveloped land, and is defined, in the case of a town, as the area that can be reached and returned from in a day for the purposes of collecting fuel and pasturing livestock.