for those that have read Toby Hemenway's book, "Gaia's Garden" I linked above...or even if you haven't....here's a fun rabbit hole to go down and learn more: this video was upload by verge permaculture:
"Toby Hemenway discusses permaculture principles, explains permaculture zones and sectors, then discusses how to use resources to their highest purpose. Toby gives you an opportunity to apply permaculture design to your own property with “homework” activities, to get you thinking about what you could do with your yard, garden, acreage, or farm.
This is the FIRST lesson in a 5 part video series is the last class that Toby Hemenway taught before he passed. Toby taught all over the world and left two incredible books behind which clearly delineate the concept of permaculture." Verge P