While I am not terribly knowledgeable about it I think permaculture is probably a search term you might be looking for. From what I have read, there have been

While I am not terribly knowledgeable about it I think permaculture is probably a search term you might be looking for. From what I have read, there have been some successful attempts to develop ecosystems that can sustainability produce food with minimal human intervention. Though I don't think that has been done at scale yet.