(from wikipedia) Permaculture is a system of agricultural and social design principles centered around simulating or directly utilizing the patterns and features observed in natural ecosystems. The term permaculture (as a systematic method) was first coined by Australians David Holmgren, then a graduate student, and his professor, Bill Mollison, in 1978. The word permaculture originally referred to “permanent agriculture”, but was expanded to stand also for “permanent culture”, as it was understood that social aspects were integral to a truly sustainable system as inspired by Masanobu Fukuoka’s natural farming philosophy.
It has many branches that include but are not limited to ecological design, ecological engineering, environmental design,construction and integrated water resources management that develops sustainable architecture, regenerative and self-maintained habitat and agricultural systems modeled from natural ecosystems.
Mollison has said: “Permaculture is a philosophy of working with, rather than against nature; of protracted and thoughtful observation rather than protracted and thoughtless labor; and of looking at plants and animals in all their functions, rather than treating any area as a single product system.