As long as there are is enforcement to prevent people from harvesting stuff to sell, there would always be more food than people. E.g. in NYC there are somethin

As long as there are is enforcement to prevent people from harvesting stuff to sell, there would always be more food than people. E.g. in NYC there are something like 30,000 acres of parks, so you could have literally hundreds of acres landscaped with edible species without meaningfully reducing other forms of public space.