Land is a finite resource. Every attempt must be made to prevent or minimize land degradation. In addition, restoration of already degraded land needs to be undertaken. Land restoration is a relatively new science that is increasingly informed by the emerging discipline of restoration ecology. Land restoration occurs at a range of different scales. Mine rehabilitation has developed many successful practices of land restoration at a site-specific scale. Most success at both regional and landscape scales has been concerned with restoring key ecosystem functions such as nutrient cycling and water balance.