Following _1491_: home to millions of people, the jungle mostly consisting of fruit-bearing trees (the modern Amazonian tribes are living in overgrown orchards), and in possession of miraculous sanitation&#x2F;fertilizer technology.<p>Everyone should know about terra preta. It turns out it wasn&#x27;t a soil-enrichment technique, it was sanitation with a side effect of soil enrichment -- and could be very applicable in the developing world (and the developed world!) today. An experiment in Germany -- look up the paper &quot;Terra Preta Sanitation&quot; -- showed that a slightly modified method of terra-preta production can sanitize human waste to well within First World standards.