Yes, the TED talk is misleading anyway. He never says it, but it makes you feel ok to eat meat. It just says that rotational grazing in arid areas, stops erosion. The only extra cows raised, should be eaten by the starving people in those places. It took a few days to clarify those points.
I tried living in Detroit for a year and a half. My teachers said, not to eat anything out of the ground, only plants grown in raised beds. I don't understand chemically how hugel beds, stay productive. A respected person told me to dump human urine on them to replace nitrogen, used by the decomposing wood.
I don't know what direction the government is taking things. They seem to want to clear it out more. Really sad.
There is an assessment period in permaculture, where you do nothing until you understand the systems in place. I was done before then. I'm too shy, people thought I was stuck up. Pleanty of people who don't have anything, but their own interests in mind, have done better there, because they have more social skills.
It is also too depressing for me, and I need access to basic government hep.