What is Terra Preta Sanitation (TPS) all about? Hype or ingenious?

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Re: What is Terra Preta Sanitation (TPS) all about? Hype or ingenious?

Seems the overall topic of soil improvements/preservation as a side effect of sustainable sanitation has been a bit forgotten about lately.

But never the less it is still a very important topic as this recent reminder on the UN world soil day illustrates:
www.scientificamerican.com/article/only-...gradation-continues/

About a third of the world's soil has already been degraded, Maria-Helena Semedo of the Food and Agriculture Organization (FAO) told a forum marking World Soil Day.
(...) Unless new approaches are adopted, the global amount of arable and productive land per person in 2050 will be only a quarter of the level in 1960, the FAO reported, due to growing populations and soil degradation.


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