The word is derived from perm anent agri culture or culture and reflects the fundamental importance of sustainable agriculture and landuse ethics as a basis for continuting culture and survival. The energy needs of the system are provided by that system.
Every element is placed in relationship to another so that thaey assist each other.
Each element performs many functions. Each important function is supported by many elements. Efficient energy planning designs by zones and sectors. The use of biological resources is emphasized over fossil fuel resources. Energy is recycles on site.